First enter your name in cell F1 on this worksheet.
A company makes frequent use of local courier services. They have tried three different courier services
(Courier 1, Courier 2, and Courier 3) and selected a courier service at random when a delivery was to be
made. For each service call, they determined and recorded the total time in minutes from when the
courier was contacted to when the courier completed delivery. The recorded results appear on
Worksheet 4-1.
Using a 0.01 significance level, is there sufficiently strong evidence of differences in the mean values of
time from contact to completed delivery for the three courier services?