7.5 In reference to question 7.4, suppose we wish to perform the onesided test H0 : u = 9 versus Ha}: H > 9 at the a = 0.01 signicance level. (a) Perform this test. Find the test statistic and critical value, plot the rejection region, and state your decision and nal conclusion. I (b) Based upon your answer in 7.5(a), will the pvalue for the test be less than a or greater than a? Why? N, ' (c) Find the pvalue for the test in 7 5(a) ((1) Based upon. your answer in 7.5(0), is the mean numb er of crossings ,u signicantly higher than 9'? Why