Homework_1_Solutions

Homework_1_Solutions - Homework 1 Solutions 1.4 a. The...

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Homework 1 Solutions 1.4 a. The population is probably all Canadians who were eligible to participate in the survey (which is probably all adults with telephones). b. There were 2000 people in the sample. 1.7 a. Randomized experiment. b. Observational study. c. Randomized experiment. d. Observational study. 1.13 In some situations it is not practical or even possible to conduct a randomized experiment. For example, a researcher may wish to study whether occupational exposure to asbestos affects the risk of lung disease. It would not be possible, or ethical, to assign people to occupations that involve differing amounts of exposure to asbestos. 2.3 a. Whole population. b. Sample 2.18 This will differ for each student. As an example, suppose a survey question about income only allowed the response categories 1 = under $20,000 and 2= $20,000 to $49,999 and 3= more than $49,999. The income categories are ordered, but so little is known about actual income that the mean response is meaningless. 2.33
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Homework_1_Solutions - Homework 1 Solutions 1.4 a. The...

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