Question

Golf cart attendants at a local country club often receive tips from golfers they assist with 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 18 attendants averaged ​$42.73 per day in tips. Assume the population standard deviation for daily tips is ​$8.94.

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

The average daily tips for an attendant is between a lower limit of $_______and an upper limit of $_________​(Round to the nearest cent as​ needed.)

Answer 1

SE = /

= 8.94/

= 2.1072

=0.02

ndf = n - 1 = 18 - 1 = 17

From Table, critical values of t = 2.5669

Confidence Interval:

42.73 (2.5669 X 2.1072)

42.73 5.4089

= ( 37.32 , 48.14)

The average daily tipsfor an attendent is between a lower limit of $ 37.32 and an upper limit of $ 48.14.