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MA 260 Statistics Module 8 Exam
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Statistics Module 8 Exam The following output from MINITAB presents the results of a hypothesis test. What is the P -value? Question options: A test of versus is performed using a significance level of. The value of the test statistic is. Is H 0 rejected? Question options: determined. A test of versus is performed using a significance level of. The value of the test statistic is.
If the true value of μ is 58, does the conclusion result in a Type I error, a Type II error, or a correct decision? Question options: sion A fleet of rental cars - all the same make, model, and year - has a mean fuel efficiency of 25 miles per gallon (mpg). A random sample of 57 cars are selected and the air filter of each is replaced with a new one. Let μ be the population mean fuel efficiency score that would occur if every car's air filter were replaced. The air filter change is deemed effective if. A test is made of versus. Consider these possible conclusions: i). The air filter changes are effective. ii). The air filter changes are not effective. iii). The air filter changes might not be effective. Which of the three conclusions is best if H 0 is not rejected? Question options: In an attempt to increase business on Monday nights, a restaurant offers a free dessert with every dinner order. Before the offer, the mean number of dinner customers on Monday was 150. Following are the numbers of diners on a random sample of Mondays while the offer was in effect.
In a simple random sample of 77 families, the mean number of children is 2.2 with a standard deviation of 0.9. You wish to determine if the population mean differs from 2.1 children per family. Determine the type of parameter to be tested and compute the test statistic. Question options: ndard deviation; test statistic 454. oportion; test statistic 2. mean; test statistic 0. mean; test statistic 0. Use technology to find the P -value for the following values of the test , sample , and alternate hypothesis H 1. , , Question options:
A sample of 39 students enroll in a program that claims to improve scores on the quantitative reasoning portion of the Graduate Record Examination (GRE). The participants take a mock GRE test before the program begins and again at the end to measure their improvement. The mean number of points improved was. Assume the standard deviation is and let μ be the population mean number of points improved. To determine whether the program is effective, a test is made of the hypotheses versus. Compute the P -value. Question options: A sample of 43 students enroll in a program that claims to improve scores on the quantitative reasoning portion of the Graduate Record Examination (GRE). The participants take a mock GRE test before the program begins and again at the end to measure their improvement. The mean number of points improved was. Assume the standard deviation is and let μ be the population mean number of points improved. To determine whether the program is effective, a test is made of the hypotheses versus.
In a simple random sample of size 98, there were 37 individuals in the category of interest. Compute the sample proportion. Question options: The following display from a TI-84 Plus calculator presents the results of a hypothesis test for a population mean μ. Do you reject H 0 at the level of significance? Question options:
The mean annual tuition and fees for a sample of 8 private colleges was with a standard deviation of. A dotplot shows that it is reasonable to assume that the population is approximately normal. You wish to test whether the mean tuition and fees for private colleges is different from. Compute the value of the test statistic and state the number of degrees of freedom. Question options: egrees of freedom egrees of freedom egrees of freedom egrees of freedom Find the critical value for the following values of the significance , sample , and alternate hypothesis H 1. , , Question options: Mercury is a heavy metal that can cause severe health problems in even small concentrations. Fish and shellfish efficiently concentrate mercury into their flesh, so it is important to monitor seafood for its mercury content.
There is not enough evidence to conclude that the mean checkout price is greater than. The mean checkout amount is less than or equal to. There is not enough evidence to conclude that the mean checkout price is less than or equal to. The mean checkout amount is greater than. 40 / 100 - 40 %
