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.
Trial Barth Tornado Reiser Shaw
1 43 37 41 43
2 46 38 45 45
3 43 39 42 46
-Referring to Table 11-3, the test is less sensitive to the assumption that the population of speeds has the same variance for the 4 brands because the sample sizes of the 4 brands are equal.

Question

Quizplus · Accepted Answer

When sample sizes are equal, it is generally safe to assume that the population variances are also equal. This makes the test less sensitive to violations of the assumption of equal variances. Therefore, the statement is true.

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