(01.03 MC) A group of people was randomly selected and asked how many hours per day each person spends on gaming. The results of the survey are displayed in the following histogram: What percentage of the people surveyed spend 3 hours or less per day gaming? (4 points)
Read Details(02.04 MC) Forty infants are being studied to test the effectiveness of diaper capacity on four types of diapers: A, B, C, and D. The researcher calculates the diaper’s actual capacity compared with its listed capacity. The response variable is the amount of capacity after one hour of treatment. Previous studies have shown the capacity may vary based on a subject’s activity level. How should the subjects be blocked? Explain. (4 points)
Read Details(02.01 MC) The principal of a high school e-mails a survey to all parents asking them to vote on the best time to have the PTA meeting. She only receives responses from 56% of the parents. Describe how the design of the survey leads to bias. (4 points)
Read Details(02.01 LC) A civil engineer wants to know the opinions of drivers about online driving tests. She obtains a list of 730 drivers who have recently completed an online driving course and e-mails a questionnaire to a randomly selected group of 200 of these drivers. Only 102 of the questionnaires are returned. Identify the population and the sample in this study. (4 points)
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