Please refer to the following for the questions number 1 and 2 The Physicians He

Question

Please refer to the following for the questions number 1 and 2 The Physicians Health Study followed 22,000 male physicians for a period of several years. About 11,000 took an aspirin every second day while the rest took a placebo. At the completion of the study, it was noted whether a subject had experienced a heart attack during the period of the study. It was found that the aspirin group had significantly fewer heart attacks than the placebo group. 1. The factor in the experiment is a. the severity of the heart attack. b. use of a placebo. c. medication used (aspirin or placebo). d. the length of the study. 2. The response variable in this experiment is a. whether a heart attack occurred. b. the placebo effect. c. whether the symptoms lessened. d. the length of the interview.

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Explanation / Answer

(first part) 1. The factor in the experiment is ::c. medication used (aspirin or placebo).

here we want to know the effict of aspirin or no aspirn(placebo), so it is factor to know its implicacy

(second part) The response variable in this experiment is::a. whether a heart attack occurred.

here we would like to know about the effeict of aspirin on heart attack , so weather a heart attack occured is dependnent variable in this case

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