 In this video we provide the solution to question number 15 for practice exam number 4 for Math 1030, in which case we have the following situation. Researchers want to investigate whether taking aspirin regularly reduces the risk of heart attack. 400 men between the ages of 50 and 80, 4 years old, are recruited as participants. The men are divided randomly into two groups. One group will take aspirin and the other group will take a sugar pill. Each man takes one pill each day for three years, but he does not know whether he is taking aspirin or the sugar pill. At the end of the study, researchers count the number of men in each group who had heart attacks. Describe the target population and the sample for the study. The target population is 50 to 84 years old. For the sake of this survey, the sample is the 400 men who participated. The sample we got were those 400 men, but the target is men themselves ranging from age 50 to 84.