A bank branch located in a commercial district of a city has developed an improved process for serving customers during the noon-1:00pm lunchperiod.The waiting time of all customers during this hour is recorded over the period of a week.A random sample of 30 customers is selected and their waiting time is recorded (see data file Bank 1).At the 0.05 level of significance is there evidence that the population mean waiting time is less than 5 minutes?

* Use the full 5 step hypothesis testing procedure as demonstrated in class.

Waiting Time 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 6.10 0.38 5.12 6.46 6.19 3.79 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 6.10 0.38 5.12 6.46 6.19 3.79 Waiting Time Mean 4.286667 Standard E 0.293852 Median 4.5 Mode 4.21 Standard D 1.609496 Sample Var 2.590478 Kurtosis 0.474022 Skewness -0.787141 Range 6.08 Minimum 0.38 Maximum 6.46 Sum 128.6 Count 30