You are a manager of a fast food restaurant. The population mean waiting time to place an order is 4.5 minutes with a population standard deviation of 1.4 minutes. You want to test if the waiting time to place an order has changed from the 4.5 minutes. You select a sample of 49 orders during a one hour period. The sample mean is 5.0 minutes. Use a 0.05 level of significance, and the p-value approach to test if there has been a change in the mean waiting time to place an order.
HO: μ "State the null hypothesis."
HA: μ "State the alternativel hypothesis."
"State the rejection rule"
"Compute the test statistic for the test stated in the problem"
"State if you reject or fail to reject the null hypothesis."