8. Read the following excerpts from the New York Times (December17,1996) article

Question

8. Read the following excerpts from the New York Times (December17,1996) article Chance of Heart Attack Increases for Those Who Suffer from Depression. A report in the December 16, 1996 issue of Circulation reports on a study that finds that those who are subjects to depression are four times more likely to have a heart attack than those who are not depressed. The study involved 1551 people in the Baltimore area who took part in a study in 1980. In this study, interviewers asked questions like In your lifetime, have you ever had two weeks or more in which you lost al interest and pleasure in things you usually cared about and enjoyed? They were also asked ques- tions about unusual changes in their appetite and in their sleep Based on this information, subjects were classified according to their depression status and their heart attack status was recorded. Of the 444 who were classified as depressed, 27 had a history of heart attack Is this an observational study or is it an experiment? ·A. experiment B. observational What is the response variable for this study? A. heart attack status . B. depression status What is the explanatory variable for this study? . A. depression status e B. heart attack status the value of 6 isa .A. statistic B. parameter

Explanation / Answer

As the researcher don't have control it is observational study.

As based on depression status heart attack is measured response variable is heart attack.

Same as above based on depression status heart attack is measured so explanatory variable is depression status.

6 is a statistics

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