EverRun Incorporated produces treadmills for use in exercise clubs and recreation centers. EverRun assembles, sells, and services its treadmills, but it does not manufacture the treadmill motors. Rather, treadmill motors are purchased from an outside vendor. Currently, EverRun is considering which motor to include in its new ER1500 series. Three potential suppliers have been identified: Venetti, Madison, and Edison; however, only one supplier will be used. The motors produced by these three suppliers are identical in terms of noise and cost. Consequently, EverRun has decided to make its decision based on how long a motor operates at a high level of speed and incline before it fails. A random sample of 10 motors of each type is selected, and each motor is tested to determine how many minutes (rounded to the nearest minute) it operates before it needs to be repaired. The sample information for each motor is as follows:

a. At the a = 0.01 level of significance, is there a difference in the average time before failure for the three different suppliers€™ motors?
b. Is it possible for EverRun to decide on a single motor supplier based on the analysis of the sample results? Support your answer by conducting the appropriate post-test analysis.

Transcribed Image Text:

Madison E 13,649 13,592 11,788 12.623 14,552 13.441 13.404 13,427 12,049 11.672 Venetti 14,722 14,699 2,627 13,010 13,570 4.217 13,687 13.465 14,786 12.494 13,296 13,262 11552 11,036 12,978 12,170 12,674 11,851 12,342 11,557