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MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022

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Download MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed and more Exams Nursing in PDF only on Docsity! 1/1 POINTS A fitness center claims that the mean amount of time that a person spends at the gym per visit is 33 minutes. Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the parameter μ. That is correct! H0: ≠33μ ; Ha: =33μ H0: =33μ ; Ha: ≠33μ H0: ≥33μ ; Ha: <33μ H0: ≤33μ ; Ha: >33μ Answer Explanation Correct answer: H0: =33μ ; Ha: ≠33μ Let the parameter μ be used to represent the mean. The null hypothesis is always stated with some form of equality: equal (=), greater than or equal to (≥), or less than or equal to (≤). Therefore, in this case, the null hypothesis H0 is =33μ . The alternative hypothesis is contradictory to the null hypothesis, so Ha is ≠33μ . QUESTION 2 1/1 POINTS The answer choices below represent different hypothesis tests. Which of the choices are right-tailed tests? Select all correct answers. That is correct! H0:X≥17.1, Ha:X<17.1 H0:X=14.4, Ha:X≠14.4 H0:X≤3.8, Ha:X>3.8 H0:X≤7.4, Ha:X>7.4 532 1.0 751 0.5 267 0.8 229 0.5 552 HelpCopy to ClipboardDownload CSV That is correct! $$r= 0.18 Answer Explanation Correct answers: $\text{r= }0.18$r= 0.18 The correlation coefficient can be calculated easily with Excel using the built-in CORREL function. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 1. Open the accompanying data set in Excel. 2. In an open cell, type "=CORREL(A2:A31,B2:B31)", and then hit ENTER. You could label the result of this cell by writing "Correlation coefficient" or "r" in an adjacent open cell. The correlation coefficient, rounded to two decimal places, is r≈0.18. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 1/1 POINTS What is the p-value of a right-tailed one-mean hypothesis test, with a test statistic of z0=1.74? (Do not round your answer; compute your answer using a value from the table below.) z1.51.61.71.81.90.000.9330.9450.9550.9640.9710.010.9340.9460.9560. 9650.9720.020.9360.9470.9570.9660.9730.030.9370.9480.9580.9660.9 730.040.9380.9490.9590.9670.9740.050.9390.9510.9600.9680.9740.06 0.9410.9520.9610.9690.9750.070.9420.9530.9620.9690.9760.080.9430. 9540.9620.9700.9760.090.9440.9540.9630.9710.977 That is correct! $$0.041 Answer Explanation Correct answers: $0.041$0.041 The p-value is the probability of an observed value of z=1.74 or greater if the null hypothesis is true, because this hypothesis test is right- tailed. This probability is equal to the area under the MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Standard Normal curve to the right of z=1.74. A standard normal curve with two points labeled on the horizontal axis. The mean is labeled at 0.00 and an observed value of 1.74 is labeled. The area under the curve and to the right of the observed value is shaded. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Using the Standard Normal Table, we can see that the p- value is equal to 0.959, which is the area to the left of z=1.74. (Standard Normal Tables give areas to the left.) So, the p-value we're looking for is p=1−0.959=0.041. QUESTION 6 1/1 POINTS Kenneth, a competitor in cup stacking, claims that his average stacking time is 8.2 seconds. During a practice session, Kenneth has a sample stacking time mean of 7.8 seconds based on 11 trials. At the 4% significance level, does the data provide sufficient evidence to conclude that Kenneth's mean stacking time is less than 8.2 seconds? Accept or reject the hypothesis given the sample data below. H0: =8.2μ seconds; Ha: <8.2μ seconds =0.04α (significance level) z0=−1.75 p=0.0401 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 them take at least one prescription medication. What are the null and alternative hypotheses for this hypothesis test? That is correct! {H0:p=0.81Ha:p>0.81 {H0:p≠0.81Ha:p=0.81 {H0:p=0.81Ha:p<0.81 {H0:p=0.81Ha:p≠0.81 Answer Explanation Correct answer: {H0:p=0.81Ha:p≠0.81 First verify whether all of the conditions have been met. Let p be the population proportion for the senior citizen patients treated at Amelia's hospital who take at least MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 one prescription medication. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 1. Since there are two independent outcomes for each trial, the proportion follows a binomial model. 2. The question states that the sample was collected randomly. 3. The expected number of successes, np=47.79, and the expected number of failures, nq=n(1−p)=11.21, are both greater than or equal to 5. Since Amelia is testing whether the proportion is the same, the null hypothesis is that p is equal to 0.81 and the alternative hypothesis is that p is not equal to 0.81. The null and alternative hypotheses are shown below. {H0:p=0.81Ha:p≠0.81 QUESTION 8 1/1 POINTS A researcher claims that the proportion of cars with manual transmission is less than 10%. To test this claim, a survey checked 1000 randomly selected cars. Of those cars, 95 had a manual transmission. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 That is correct! MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 The following table can be utilized which provides areas under the Standard Normal Curve: MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 z 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 -1.8 0.036 0.035 0.034 0.034 0.033 0.032 0.031 0.031 0.030 0.029 -1.7 0.045 0.044 0.043 0.042 0.041 0.040 0.039 0.038 0.038 0.037 -1.6 0.055 0.054 0.053 0.052 0.051 0.049 0.048 0.047 0.046 0.046 -1.5 0.067 0.066 0.064 0.063 0.062 0.061 0.059 0.058 0.057 0.056 -1.4 0.081 0.079 0.078 0.076 0.075 0.074 0.072 0.071 0.069 0.068 $$P-value=0.124 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Answer Explanation Correct answers: $\text{P-value=}0.124$P-value=0.124 Here are the steps needed to calculate the p-value for a hypothesis test for a proportion: 1. Determine if the hypothesis test is left tailed, right tailed, or two tailed. 2. Compute the value of the test statistic. 3. If the hypothesis test is left tailed, the p-value will be the area under the standard normal curve to the left of the test statistic z0 If the test is right tailed, the p-value will be the area under the standard normal curve to the right of the test statistic z0 If the test is two tailed, the p-value will be the area to the left of −|z0| plus the area to the right of |z0| under the standard normal curve MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 For this example, the test is a two tailed test and the test statistic, rounding to two decimal places, is z=0.1033−0.120.12(1−0.12)900−−−−−−−−−−−−√≈−1.54. Thus the p-value is the area under the Standard Normal curve to the left of a z-score of -1.54, plus the area under the Standard Normal curve to the right of a z- score of 1.54. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 z 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 -1.8 0.036 0.035 0.034 0.034 0.033 0.032 0.031 0.031 0.030 0.029 -1.7 0.045 0.044 0.043 0.042 0.041 0.040 0.039 0.038 0.038 0.037 -1.6 0.055 0.054 0.053 0.052 0.051 0.049 0.048 0.047 0.046 0.046 -1.5 0.067 0.066 0.064 0.063 0.062 0.061 0.059 0.058 0.057 0.056 -1.4 0.081 0.079 0.078 0.076 0.075 0.074 0.072 0.071 0.069 0.068 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 of 5%.) That is correct! The decision is to reject the Null Hypothesis. The conclusion is that there is enough evidence to support the claim. The decision is to fail to reject the Null Hypothesis. The conclusion is that there is not enough evidence to support the claim. Answer Explanation Correct answer: The decision is to reject the Null Hypothesis. The conclusion is that there is enough evidence to support the claim. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 To come to a conclusion and interpret the results for a hypothesis test for proportion using the P-Value Approach, the first step is to compare the p-value from the sample data with the level of significance. The decision criteria is then as follows: If the p-value is less than or equal to the given significance level, then the null hypothesis should be rejected. So, if p≤α, reject H0; otherwise fail to reject H0. When we have made a decision about the null hypothesis, it is important to write a thoughtful conclusion about the hypotheses in terms of the given problem's scenario. Assuming the claim is the null hypothesis, the conclusion is then one of the following: if the decision is to reject the null hypothesis, then the conclusion is that there is enough evidence to reject the claim. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 if the decision is to fail to reject the null hypothesis, then the conclusion is that there is not enough evidence to reject the claim. Assuming the claim is the alternative hypothesis, the conclusion is then one of the following: if the decision is to reject the null hypothesis, then the conclusion is that there is enough evidence to support the claim. if the decision is to fail to reject the null hypothesis, then the conclusion is that there is not enough evidence to support the claim. In this example, the p-value = 0.026. We then compare the p-value to the level of significance to come to a conclusion for the hypothesis test. In this example, the p-value is less than the level of significance which is 0.05. Since the p-value is greater than the level of significance, the conclusion is to reject the null hypothesis . MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 H0:p=0.5; Ha:p<0.5, which is a left-tailed test. H0:p=0.6; Ha:p≠0.6, which is a two-tailed test. H0:p=0.5; Ha:p≠0.5, which is a two-tailed test. Answer Explanation Correct answer: H0:p=0.5; Ha:p≠0.5, which is a two-tailed test. The null hypothesis should be true proportion: H0:p=0.5. Becky wants to know if the true proportion of heads is different from 0.5. This means that we just want to test if the proportion is not 0.5. So, the alternative hypothesis is Ha:p≠0.5, which is a two- tailed test. QUESTION 12 1/1 POINTS MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 John owns a computer repair service. For each computer, he charges $50 plus $45 per hour of work. A linear equation that expresses the total amount of money John earns per computer is y=50+45x. What are the independent and dependent variables? What is the y-intercept and the slope? That is correct! The independent variable (x) is the amount of time John fixes a computer. The dependent variable (y) is the amount, in dollars, John earns for a computer. John charges a one-time fee of $50 (this is when x=0), so the y-intercept is 50. John earns $45 for each hour he works, so the slope is 45. The independent variable (x) is the amount, in dollars, John earns for a computer. The dependent variable (y) is the amount of time John fixes a computer. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 John charges a one-time fee of $45 (this is when x=0), so the y-intercept is 45. John earns $50 for each hour he works, so the slope is 50. The independent variable (x) is the amount, in dollars, John earns for a computer. The dependent variable (y) is the amount of time John fixes a computer. John charges a one-time fee of $50 (this is when x=0), so the y-intercept is 50. John earns $45 for each hour he works, so the slope is 45. The independent variable (x) is the amount of time John fixes a computer. The dependent variable (y) is the amount, in dollars, John earns for a computer. John charges a one-time fee of $45 (this is when x=0), so the y-intercept is 45. John earns $50 for each hour he works, so the slope is 50. Answer Explanation Correct answer: MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 2 5 3 7 4 9 5 9 That is correct! MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A scatterplot has a horizontal axis labeled Hours studying from 0 to 6 in increments of 1 and a vertical axis labeled Quiz score from 0 to 10 in increments of 2. The following points are plotted: left-parenthesis 1 comma 5 right- parentheses; left-parenthesis 2 comma 5 right- parentheses; left-parenthesis 3 comma 7 right- parentheses; left- MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 parenthesis 4 comma 9 right-parentheses; left-parenthesis 5 comma 9 right- parentheses. All values are approximate. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A scatterplot has a horizontal axis labeled Hours studying from 0 to 6 in increments of 1 and a vertical axis labeled Quiz score from 0 to 12 in increments of 2. The following points are plotted: left-parenthesis 1 comma 5 right- parentheses; left-parenthesis 2 comma 5 right- parentheses; left-parenthesis 3 comma 8 right- parentheses; left- parenthesis 4 comma 8 right-parentheses; left-parenthesis 5 comma 11 right- parentheses. All values are approximate. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Answer Explanation Correct answer: MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A scatterplot has a horizontal axis labeled Hours studying from 0 to 6 in increments of 1 and a vertical axis labeled Quiz score from 0 to 10 in increments of 2. The following points are plotted: left-parenthesis 1 comma 5 right-parentheses; left-parenthesis 2 comma 5 right-parentheses; left-parenthesis 3 comma 7 right-parentheses; left- parenthesis 4 comma 9 right-parentheses; left-parenthesis 5 comma 9 right- parentheses. All values are approximate. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 The values for hours studying correspond to x-values, and the values for quiz score correspond to y-values. Each row of the table of data corresponds to a point (x,y) plotted in the scatter plot. For example, the first row, 1,5, corresponds to the point (1,5). Doing this for every row in the table, we find the scatter plot should MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Correct answer: The estimate, a predicted time of 31.85 minutes, is both reliable and reasonable. The data in the table only includes video game times between 30 and 120 minutes, so the line of best fit gives reasonable predictions for values of x between 30 and 120. Since 95 is between these values, the estimate is both reliable and reasonable. QUESTION 15 0/1 POINTS Which of the following are feasible equations of a least squares regression line for the annual population change of a small country from the year 2000 to the year 2015? Select all that apply. That's not right. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 yˆ=38,000+2500x yˆ=38,000−3500x yˆ=−38,000+2500x yˆ=38,000−1500x Answer Explanation Correct answer: yˆ=38,000+2500x yˆ=38,000−1500x MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Population change can be positive or negative, and it can increase or decrease. Based on the given information, there are no practical limits to population change, although there are limits such as the decrease in population cannot exceed the current population (as it would leave a negative number of people in the country), or the increase in population could be limited by other real-world factors (such as lack of space or legal immigration limits). Your answer: yˆ=38,000+2500x QUESTION 170/1 POINTS Find the Type II error given that the null hypothesis, H0, is: a building inspector claims that no more than 15% of structures in the county were built without permits. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Weight Mileage MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 The weight of a car can influence the mileage that the car can obtain. A random sample of 20 cars’ weights and mileage is collected. The table for the weight and mileage of the cars is given below. Use Excel to find the best fit linear regression equation, where weight is the explanatory variable. Round the slope and intercept to three decimal places. 30.0 32.2 20.0 56.0 20.0 46.2 45.0 19.5 40.0 23.6 45.0 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 16.7 25.0 42.2 55.0 13.2 17.5 65.4 HelpCopy to ClipboardDownload CSV That's not right. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 1$-1.181$−1.181 2$71.374$71.374 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 y = $$1.181 x + $$71.374 Answer Explanation y = 1$$ x + 2$$ Correct answers: To find the best fit for the given data, use Excel. 1.Open Excel. Enter the values of weight in column A and mileage in column B. Highlight all the cells containing the data. 2.From the Insert tab, select Scatter. Use Scatter with only Markers, the first type of scatter chart. A simple plot is shown. 3.To add the linear fit to the graph, click anywhere inside the graph MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Correct answer: The study is an observational study. The samples are chosen using an appropriate process; however, no attempt is made to control any aspect of the sample even though the variables of interest are recorded for each group. QUESTION 20 1/1 POINTS To test the effectiveness of a drug proposed to relieve symptoms of headache, physicians included participants for a study. They gave the drug to one group and a drug with no therapeutic effect to another group. Which group receives the placebo? That is correct! the physicians MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 the group that received the drug for headache the group that received the drug with no therapeutic effect all of the people in the study Answer Explanation Correct answer: the group that received the drug with no therapeutic effect When the experimental units are people, applying treatments that should be inert can actually have effects. In this study, the drug with no therapeutic effects is the placebo, so the group that receives that drug receives the placebo. QUESTION 21 1/1 POINTS A doctor notes her patient's temperature in degrees Fahrenheit every hour to make sure the patient does not get a fever. What is the level of measurement of the data? MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 That is correct! nomi nal ordin al inter val ratio Answer Explanation Correct answer: interval This is interval data because degrees Fahrenheit is a numerical scale where differences are meaningful. However, because Fahrenheit does not have a true zero value, it is not ratio data. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 1$10$10 2$15$15 3$6$6 4$16$16 5$21$21 6$7$7 7$22$22 8$27$27 9$4$4 10$28$28 11$33$33 12$3$3 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Correct answers: MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Lower Class Limit Upper Class Limit 1$$ 2$$ 4$$ 5$$ 7$$ 8$$ 10$$ 11$$ MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Note that the data is not ordered and that we have been asked to use 4 classes. To determine the class width, use the formula: Max Value−Min ValueNumber of Classes=31−104=5.25. Since this value is not an integer, round to 6. Use the minimum value, 10, for the lower class limit of the first class. To find all other lower class limits, add the class width, 6. For example, the second lower class limit would be: 10+6=16. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Lower Class Limit Upper Class Limit Frequency 10 16 22 28 To find the upper class limits, add the class width minus 1, to each lower class limit. For example, the upper class limit of the first class would be: 10+5=15. Lower Class Limit Upper Class Limit Frequency 10 15 16 21 22 27 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A histogram has a vertical axis labeled Frequency and has a horizontal axis that measures six categories of rainbow trout weight (in pounds). Reading from left-to-right, the weight and frequency of each category are: 4.5 to 6.5 has frequency of 4, 6.5 to 8.5 has frequency 5, 8.5 to 10.5 has frequency 7, 10.5 to 12.5 has frequency 3, 12.5 to 14.5 has frequency 1, 14.5 to 16.5 has frequency 2. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 That is correct! $$greater than 12.5 but less than 14.5 Answer Explanation Correct answers: $\text{greater than }12.5\ \text{but less than }14.5$greater than 12.5 but less than 14.5 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 The range 12.5−14.5 has the lowest bar in the histogram, which means that this range of values also has the lowest frequency. Therefore, 1 visitor caught a rainbow trout that weighed greater than 12.5 but less than 14.5 pounds. QUESTION 24 1/1 POINTS Describe the shape of the given histogram. A histogram has a horizontal axis from 0 to 16 in increments of 2 and a vertical axis labeled Frequency from 0 to 10 in increments of 2. The histogram contains vertical bars of width 1 starting at the horizontal axis value 0. The heights of the bars are as follows, where the left horizontal axis label is listed first and the frequency is listed second: 0, 0; 1, 0; 2, 6; 3, 6; 4, 7; 5, 6; 6, 6; 7, 6; MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A bar graph has a horizontal axis labeled Classes and a vertical axis labeled Students from 0 to 16 in increments of 2. There are two vertical bars above each horizontal axis label, with the bar on the left representing Boys and the bar on the right representing Girls. The bars have heights as follows, with the horizontal axis label listed first and the bar heights listed second from left to right: Mrs. Brown, 10 and 15; Ms. James, 11 and 12. How many total students are in Ms. James's class? Do not include the units in your answer. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 That is correct! $$23 Answer Explanation Correct answers: $23$23 To find the number of students in Ms. James's class, find the heights of the bars for that class and add them. In this case, we find it is 11+12=23. QUESTION 26 0/1 POINTS The line graph shown below represents the number of TVs in a house by square footage (in hundreds of feet). According to the information above, which of the following is an appropriate analysis of square footage and TVs? MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A line graph has an x-axis labeled Square Footage (in hundreds of feet) in increments of one, and a y-axis labeled Number of TV's in increments of one. Beginning at the point start parentheses 6,2 end parentheses, a line increases to the point start parentheses 8.5,3 end parentheses. The line remains constant to the point start MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Alice sells boxes of candy at the baseball game and wants to know the mean number of boxes she sells. The numbers for the games so far are listed below. 16,14,14,21,15 Find the mean boxes sold. That is correct! $$mean=16 boxes Answer Explanation Correct answers: $\text{mean=}16\text{ boxes}$mean=16 boxes MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Remember that the mean is the sum of the numbers divided by the number of numbers. There are 5 numbers in the list. So we find that the mean boxes sold is QUESTION 28 1/1 POINTS Given the following list of prices (in thousands of dollars) of randomly selected trucks at a car dealership, find the median. 20,46,19,14,42,26,33 That is correct! $$median=26 thousands of dollars Answer Explanation Correct answers: $\text{median=}26\text{ thousands of dollars}$median=26 thousands of dollars It helps to put the numbers in order. 14,19,20,26,33,42,46 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 That is correct! MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Now, because the list has length 7, which is odd, we know the median number will be the middle number. In other words, we can count to item 4 in the list, which is 26. So the median price (in thousands of dollars) of randomly selected trucks at a car dealership is 26. QUESTION 29 1/1 POINTS Each person in a group shuffles a deck of cards and keeps selecting a card until a queen appears. Find the mode of the following number of cards drawn from a deck until a queen appears. 3,12,3,11,5,5,3,10,12 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A bar graph has a horizontal axis titled Values labeled from 2 to 18 in increments of 2 and a vertical axis titled Frequency labeled from 0 to 200 in increments of 50. 14 bars are plotted, above the numbers 2 to 16. From left to right, the heights of the bars are as follows: 1. 5. 10. 40, 75, 125, 190, 180, 130, 125, 60, 25,20, 10. All values are MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 approximate. That is correct! The data are skewed to the left. The data are skewed to the right. The data are symmetric. Answer Explanation MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Correct answer: The data are symmetric. Note that the histogram appears to be roughly symmetric. So the data are symmetric. QUESTION 31 1/1 POINTS Which of the data sets represented by the following box and whisker plots has the smallest standard deviation? MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 plot above the class label D has the following five-number summary: 2, 63, 77, 92, and 138. All values are approximate. That is correct! A B C D Answer Explanation Correct answer: C Remember that the standard deviation is a measure of how spread out the data is. If the values are concentrated around the mean, then a data set has a lower standard deviation. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A box and whisker plot with short whiskers and a short box has values that are less spread out, and hence has a smaller standard deviation. QUESTION 32 1/1 POINTS The graph below shows the graphs of several normal distributions, labeled A, B, and C, on the same axis. Determine which normal distribution has the smallest standard deviation. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 A figure consists of three curves along a horizontal axis, labeled Upper A, Upper B and Upper C. Curve Upper A is short and the most spread out, curve Upper B is tall and the least spread out, and curve C is farther to the left than A. That is correct! A MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 The results of the experiment are significant at the 0.01 level of significance. This means the probability that the outcome was the result of chance is 0.01 or less. Because of this, we can be fairly confident, but not certain, that the coin is not a fair coin. QUESTION 34 1/1 POINTS Is the statement below true or false? Independent is the property of two events in which the knowledge that one of the events occurred does not affect the chance the other occurs. That is correct! True MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 False Answer Explanation Correct answer: True Independent is defined as the property of two events in which the knowledge that one of the events occurred does not affect the chance the other occurs. QUESTION 35 1/1 POINTS Of the following pairs of events, which pair has mutually exclusive events? That is correct! rolling a sum greater than 7 from two rolls of a standard die and rolling a 4 for the first throw drawing a 2 and drawing a 4 with replacement from a MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 standard deck of cards rolling a sum of 9 from two rolls of a standard die and rolling a 2 for the first roll drawing a red card and then drawing a black card with replacement from a standard deck of cards Answer Explanation Correct answer: rolling a sum of 9 from two rolls of a standard die and rolling a 2 for the first roll Mutually exclusive events are events that cannot occur together. In this case, rolling a sum of 9 from two rolls of a standard die and rolling 2 for the first roll are two events that cannot possibly occur together. QUESTION 36 1/1 POINTS MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Answer Explanation Correct answers: $\left(67,\ 87\right)$(67, 87) A confidence interval is an interval of values, centered on a point estimate, of the form (pointestimate−marginof error,pointestimate+marginof error) Using the given point estimate for the mean, x¯=77 and margin of error 10, the confidence interval is: (77−10,77+10)(67,87) QUESTION 38 1/1 POINTS A random sample of adults were asked whether they prefer reading an e-book over a printed book. The survey resulted in a sample proportion of p′=0.14, with a sampling standard deviation of p′=0.02σ , who preferred reading an e-book. MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 Use the empirical rule to construct a 95% confidence interval for the true proportion of adults who prefer e- books. That is correct! $$(0.10, 0.18) Answer Explanation Correct answers: $\left(0.10,\ 0.18\right)$(0.10, 0.18) By the Empirical Rule, a 95% confidence interval corresponds to a z- score of z=2. Substituting the given values p′=0.14 and p′=0.02σ , a confidence interval is (p′−z p′,p′+z p′)(0.14−2 0.02,0.14+2 0.02)(0.14−0.04,0.14+0.04)⋅σ ⋅σ ⋅ ⋅ (0.10,0. 18) MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022 QUESTION 39 1/1 POINTS The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we want to be 95% confident that the sample mean is within 2 inches of the true population mean, what is the minimum sample size that can be taken? z0.101.282z0.051.645z0.0251.960z0.012.326z0.0052.576 Use the table above for the z-score, and be sure to round up to the nearest integer. That is correct! $$14 dog heights Answer Explanation Correct answers: $14\text{ dog heights}$14 dog heights The formula for sample size is n=z2 2EBM2σ . In this MATH-225n-FINAL EXAM Questions and Answers 100% correct/verified best Rated A+ Guaranteed latest update 2022