Question 4 [7 marks] Part a) (3 marks) Calculate the statistic, set up the rejection region, draw the sampling distribution and interpret the result, Part b) Ho: =10 H: #10 Given that: 0=10, n=100, X=10, a=0.05. (4 marks) A business student claims that, on average, an MBA student is required to prepare more than five cases per week. To examine the claim a professor asks a random sample 10 MBA student to report the number of cases they prepare weekly; the professor calculates the mean value and standard deviation, which is 6 and 1.5, respectively. Can the professor conclude at the 5% significance level that the claim is true, assuming that the number of case is normal distribution?