10.39 Clinical therapies 2 Refer to the previous exercise.

a. For the null hypothesis, H0: m1 = m2, show that t = 2.62 and the two-sided P@value = 0.059. Interpret.

b. What decision would you make in the test, using a (i)

0.05 and (ii) 0.10 significance level? Explain what this means in the context of the study.

c. Suppose the researcher had predicted ahead of time that Therapy 1 would be better. To which Ha does this correspond?

Report the P-value for it, and make a decision with significance level 0.05.