TABLE 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.
-True or False: Referring to Table 11-3,the test is valid only if the population of speeds has the same variance for the 4 brands.

Question

TABLE 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. 
-True or False: Referring to Table 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 certain statistical tests, like ANOVA, depends on the assumption of homogeneity of variances across groups or populations.

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