Question

Managers at an automobile manufacturing plant would like to examine the mean completion time, w, of an assembly line operation. The past data indicate that the mean completion time is 42 minutes, but the managers have reason to believe that this value has changed. The managers plan to perform a statistical test. After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 46 minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of 4 minutes. Based on this information, answer the questions below. 00 What are the null hypothesis (H) and the alternative hypothesis (W) that should be used for the test? Horis Hits In the context of this test, what is a Type Il error? A Type Il errors when, in fact, is the hypothesis that is Suppose that the managers decide to reject the null hypothesis What sort of error might they be maling X 5 ? Check Steve For Later

Answer 1

solution: Ho! l is 42. Ha i el ¥ 42 (Changed) Ty pell error failing to reject А the hypothesis in. fact llis that de is equal to 142 when changed # 42. t suppore that the managea decided to reject the Ho sort ot we eror might be IType I