SCENARIO 11-3
As part of an evaluation program,a sporting goods retailer wanted to compare the downhill coasting speeds of 4 brands of bicycles.She took 3 of each brand and determined their maximum downhill speeds.The results are presented in miles per hour in the table below.

-Referring to Scenario 11-3,the test is valid only if the population of speeds has the same variance for the 4 brands.

Question

SCENARIO 11-3
As part of an evaluation program,a sporting goods retailer wanted to compare the downhill coasting speeds of 4 brands of bicycles.She took 3 of each brand and determined their maximum downhill speeds.The results are presented in miles per hour in the table below.
  
-Referring to Scenario 11-3,the test is valid only if the population of speeds has the same variance for the 4 brands.

Quizplus · Accepted Answer

The validity of the test depends on the assumption of equal variances among the four brands. If the variances are significantly different, then the results of the test may not be reliable. Therefore, the statement is true.

SCENARIO 11-3 As Part of an Evaluation Program,a Sporting Goods Retailer Wanted