Mariam, the branch manager of a major bank, wants to improve customer service. She is thinking about giving a 10-Dhs discount voucher at Starbucks coffee to any customer who waits more than 8 minutes. However, to get a better idea about the level of current service, she undertakes a survey of customers. Using the queuing system database, she extracted the times spent waiting in line by a random sample of 48 customers and found that the mean and the standard deviation of the waiting times were 5.62 and 2.79 minutes, respectively. Mariam decided to proceed with her plan only if the results strongly indicate that the mean waiting time is less than minutes. At a 5% significance level and using the appropriate hypothesis, what would be your recommendation to Mariam regarding her plan? ( CLOS, CLO6 ) 6.0000 hypothesized value 5.6200 mean waiting time 2.7900 stddev. 0.4027 stderror 48 47 df -0.944 t .1751 - value