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WEEK 2 QUIZ GREEN IS
CORRECT QUESTION 1
A company has developed a wristband for monitoring blood sugar levels without requiring direct blood samples. It is interested in demonstrating the accuracy of the device for governmental approval and has decided to test the claim "The glucose level reported by the wristband is within 10% of a standard blood test result." Which of the following data collection processes would be appropriate? Select only one
answer choice.
Select the correct answer below:
Choose a random sample of employees at lunchtime and measure their blood sugar using both the wristband and a standard blood test.
Choose a random sample of people from the local area and random times throughout the day and measure their blood sugar using both the wristband and a standard blood test.
Choose a random sample of people from the local area and random times and measure their blood sugar using the wristband. Choose another random sample of people and random times and measure their blood sugar using the standard blood test.
Go to a hospital and have the doctors choose a random sample of patients to be tested at random times using both the wristband and the standard blood test.
QUESTION 2
A farmer divided his piece of land into 4 equivalent groups. The quality of the soil is the same across
the 4 groups of land. He planted the same crop in all 4 groups of land and recorded the yield of the crop in all 4 groups for a 4 week period. Is the study observational or experimental? If it is an experiment,
what is the controlled factor?
Select the correct answer below:
The study is an observational study.
The study is an experiment. The controlled factor is the 4 week observation period.
the number of people surveyed
political party associations
gender
none of the above
QUESTION 5
Is the statement below true or false?
Continuous data are the type of quantitative data that is the result of measuring.
Select the correct answer below:
True
False
Question 6
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?
Select the correct answer below:
nominal
ordinal
interval
ratio
Question 7
the specific number of siblings for each randomly selected student
all the students in the school
the mean number of siblings for the randomly selected students
the mean number of siblings for all students in the school
Question 8
True or False? In reference to different sampling methods, systematic sampling includes the steps: divide the population into groups; use simple random sampling to identify a proportionate number of individuals from each group.
Select the correct answer below:
True
False
QUESTION 9
While standing on a highway overpass, Jennifer wonders what proportion of the vehicles that pass on the highway below are trucks. The highway has 4 lanes running in each direction. Jennifer is only interested in the proportion of vehicles that pass over the course of the hour that she spends there.
Which of the following sampling methods would be best for Jennifer to employ?
Select the correct answer below:
Obtain a cluster sample by randomly selecting 3 of the 36 numbers and letters that might be at the beginning of a license plate, and select every vehicle whose license plate starts with one of
those 3 numbers or letters.
Obtain a convenience sample by watching 1 lane and selecting every vehicle that passes in that lane.
Obtain a systematic sample by selecting every 20th vehicle that passes (in any lane and going in any direction).
Question 11
The values and relative frequencies for a set of data are shown below.
Complete the cumulative relative frequency table.
Provide your answer below:
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. to 12.5 has frequency 3, 12.5 to 14.5 has frequency 1, 14.5 to 16.5 has frequency 2.
Provide your answer below:
12.5-14.
Question 13
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; 8, 7; 9, 6; 10, 6; 11, 6; 12, 6; 13, 7; 14, 0; 15, 0.
Select the correct answer below:
6
less than or equal to 19. There are values in the data set which are greater
than or equal to 30 and less than or equal to 39. There are values in the
data set which are greater than or equal to 20 and less than or equal to 29.
Question 15
The bar graph below shows the number of boys and girls in different classes.
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.
Provide your answer below:
23
Question 16
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?
Question 17
Ashley is reviewing past monthly credit card statements. The statements are summarized in the relative frequency table below.
What is the cumulative relative frequency of credit card statements that are $1245 or less?
Provide your answer below: ANSWER IS CORRECT 0.
Question 18
The bar graph below shows the number of men and women in different clubs.
