15. Chapter 1, Problem 1.6 Aa Aa In 1988 the Steering Committee of the Physician

Question

15. Chapter 1, Problem 1.6 Aa Aa In 1988 the Steering Committee of the Physicians' Health Study Research Group released the results of a 5-year randomized experiment conducted using 22,071 male physicians between the ages of 40 and 84. The purpose of the experiment was to determine whether or not taking aspirin reduces the risk of a heart attack. The physicians had been randomly assigned to one of the two treatment groups. One group took an ordinary aspirin tablet every other day, while the other group took a placebo. None of the physicians knew whether he was taking the actual aspirin or the placebo The results, shown in the following table, support the conclusion that taking aspirin does indeed help to reduce the risk of having a heart attack. The rate of heart attacks in the group taking aspirin was only about half the rate of heart attacks in the placebo group. In the aspirin group, there were 9.42 heart attacks per 1,000 participating doctors, whereas in the placebo group, there were 17.13 heart attacks per 1,000 participants Heart Doctors Attacks per Treatment Attacks in Group 1,000 Doctors Aspirin Placebo 104 11,037 18911,034 9.42 17.13 Using this case study as an example, which of the following statements explain the difference between a population and a sample. Check all that apply The sample of interest is probably all men, and possibly women as well A population is a collection of all individuals of interest, whereas a sample is a subset of the population of interest for which measurements are taken The population of interest is probably all men, and possibly women as well A sample is a collection of all individuals of interest. The population to which the results apply is all men similar to those in the study The population to which the results apply is all men and all women

Explanation / Answer

A population is a collection of all individuals of interest, whereas a sample is a subset of the population of interest for which measurements are taken The population of interest is probably all men, and possibly women as well. The population to which the result apply is all men and all women.

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