Golf cart attendants at a local country club often receive tips from golfers they assist with their golf clubs. To help recruit new employees, the country club would like to determine the average tips per day an attendant earns. A sample of 16 attendants averaged $42.60 per day in tips.

Assume the population standard deviation for daily tips is

$9.00.

a. Construct a 98% confidence interval to estimate the average daily tips for an attendant.

b. What assumption needs to be made for this procedure?

c. Verify your results with Excel.

AppendixLO1