6.93 Exercise and statistics exams. A study examined whether light exercise performed an hour before the final exam in statistics affects how students perform on the exam. The P-value was given as 0.13.

a. State null and alternative hypotheses that could be used for this study. (Note: There is more than one correct answer.)

b. Do you reject the null hypothesis? State your conclusion in plain language.

c. What other facts about the study would you like to know for a proper interpretation of the results?