Question 10.61 (pg. 502)

(a) What is $\displaystyle \alpha$ for the test procedure that rejects $\displaystyle {H}_{{0}}$ if $\displaystyle {z}\le-{1.28}$?

(b) If the test procedure of part (a) is used, calculate $\displaystyle \beta$ when $\displaystyle \mu={9.8}$.

(c) Compute $\displaystyle \beta$ when $\displaystyle \mu={9.5}$.

(d) What is the power of the test when $\displaystyle \mu={9.8}$?

When $\displaystyle \mu={9.5}$?