9.30 THE BANK CUSTOMER WAITING TIME CASE DS Wait Time Recall That A Bank Manager Has Developed A New System To Reduce The Time Customers Spend Waiting For Teller Service During Peak Hours. The Manager Hopes The New System Will Reduce Waiting Times From The Current 9 To 10 Minutes To Less Than 6 Minutes. A Letting U Represent The Mean Waiting Time Under The

 

9.30 THE BANK CUSTOMER WAITING TIME CASE Os Wait Time Recall that a bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes. a Letting represent the mean waiting time under the new system, set up the null and alternative hypotheses needed if we wish to attempt to provide evidence supporting the claim that is shorter than six minutes. b The mean and the standard deviation of a sample of 100 bank customer waiting times are 5.46 and 2.475, respectively. (1) Use a critical value to test the hypotheses you set up in part a by setting a equal to .05. (2) Interpret the p-value of .0158 for the test.