The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes with a standard deviation of 0.5 minutes. We want to test to determine whether the mean waiting time of all customers is significantly more than 3 minutes. What are the hypotheses? What is the test statistic? What is the p-value? At =0.05, what is your conclusion? Explain