Do Corporate Executives Who Exercise Regularly Score Lower Than Corporate

Essay

Do corporate executives who exercise regularly score lower than corporate executives in general on a scale of stress symptoms? For corporate executives in general, the average on this test is 80 with a standard deviation of 12. The distribution is normal. A researcher measured 20 exercising executives and found them to have a mean score of 72. Is this difference significant at the .05 level?
a. Use the five steps of hypothesis testing.
b. Figure the confidence limits for the 95% confidence interval.
c. Explain the logic of what you did to a person who is unfamiliar with hypothesis testing involving a sample of more than one individual.