A health psychologist knew that corporate executives in general have an average stress inventory score of 80 with a standard deviation of 12, and that the scores obtained using the inventory are distributed normally. In order to learn whether exercise is associated with a difference in stress scores among corporate executives, the psychologist measured the stress of a sample of 25 exercising executives and found them to have a mean score of 72.

Now address the following question at the .05 level of significance (5%): do executives who exercise have higher stress scores than the general population of executives? What is the correct RESEARCH HYPOTHESIS in this instance?

a) general= research

b)generalresearch

c) general>research

d)general

Now address the following question at the .05 level of significance (5%): do executives who exercise have lower stress scores than the general population of executives? What is the correct RESEARCH HYPOTHESIS in this instance?

a) general= research

b)generalresearch

c) general>research

d)general