Referring to the study of Exercise 1:
a) Is the alternative to the null hypothesis more naturally one sided or two-sided?
b) The P-value from a clinical trial testing the hypothesis is 0.0028. What do you conclude?
c) What would you have concluded if the P-value had been 0.28?

Data From Exercise 1

A very large study showed that aspirin  reduced the rate of first heart attacks by 44%. A pharmaceutical  company thinks they have a drug that will be more effective than  aspirin, and plans to do a randomized clinical trial to test the new  drug. What is the null hypothesis the company will use?