QUESTION 19 During the 1980s 22,000 physicians over the age of 40 agreed to part

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QUESTION 19 During the 1980s 22,000 physicians over the age of 40 agreed to participate in a long-term study called the Physicians Health Study. The question investigated was whether aspirin helps lower the rate of heart attacks for adults over the age of 40. The physicians were randomly assigned to take aspirin or take a placebo. The population of interest is: Oa all the 22,000 physicians over the age of 40 that participated in the study. b all adults over the age of 40. Oc none of the other options d all physicians over the age of 40. QUESTION 20 You would like to determine the knowledge of geography in the US population. You decide that to make your study viable, you are going to collect data from all persons currently affiliated with UAlbany, students, faculty and staff. With the help of Institutional research, you select a random sample of 500 persons at UAlbany and e- mail them a survey with geography questions. The sampling frame is

Explanation / Answer

Answer - 19: Population of interest: All adults over the age of 40

Option B is correct.

Answer - 20: Sampling frame: All the 22000 physicians over the age of 40 that participated in the study

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