TABLE 10-18
As part of an evaluation program, a sporting goods retailer wanted to compare the downhill coasting speeds of four brands of bicycles. She took three of each brand and determined their maximum downhill speeds. The results are presented in miles per hour in the table below

-Referring to Table 10-18, the test is valid only if the population of speeds is normally distributed.

Question

TABLE 10-18
As part of an evaluation program, a sporting goods retailer wanted to compare the downhill coasting speeds of four brands of bicycles. She took three of each brand and determined their maximum downhill speeds. The results are presented in miles per hour in the table below
 
-Referring to Table 10-18, the test is valid only if the population of speeds is normally distributed.

Quizplus · Accepted Answer

The validity of the test for comparing the speeds of four brands of bicycles depends on the assumption that the population of speeds is normally distributed. Therefore, the statement is true.

TABLE 10-18 As Part of an Evaluation Program, a Sporting Goods Retailer