Regional Manager Sue Collins Would Like to Know If the Mean

Essay

Regional Manager Sue Collins would like to know if the mean number of telephone calls made per 8-hour shift is the same for the telemarketers at her three call centers (Austin, Las Vegas, and Albuquerque). A simple random sample of 6 telemarketers from each of the three call centers was taken and the number of telephone calls made in eight hours by each observed employee is shown below.
Using a = .10, test for any significant difference in the mean number of telephone calls made at the three call centers.