The manager of a local fast-food restaurant is interested in improving the service provided to customers who use the restaurant's drive-up window. As a first step in this process, the manager asks his assistant to record the time it takes to serve a large number of customers at the final window in the facility's drive-up system. The results are in the fileP07_08.xlsx, which consists of nearly 1200 service times. For this problem, you can assume that the population is the data in this file.

Use Excel to generate a simple random sample of size 30 from the data.

Round your answers to two decimal places, if necessary.

a.Calculate a point estimate of the population mean from the sample selected above