1. A study examining if administering a medication A and participating in regula

Question

1. A study examining if administering a medication A and participating in regular aerobic exercise is associated with improvements in patient anxiety post myocardial infarction. In the final regression model the R square value is 0.27. You know this means:

A. Exercise significantly improves anxiety seen post myocardial infarction 27% of the time

B. Exercise and administering medication A explain 27% of the variance seen in anxiety post myocardial infarction

C. Exercise and administering medication A improves anxiety seen post myocardial infarction

D. Exercise and administering medication A decrease anxiety seen post myocardial infarction by 27%

Explanation / Answer

R square is the Coefficient of Determination which shows percentage of variation in y which is explained by all the x variables.

Hence here R square is 0.27, which means exercise which is x variable explain 27% of the variance in anxiety post myocardial infarction

So answer is

B. Exercise and administering medication A explain 27% of the variance seen in anxiety post myocardial infarction

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