TABLE 11-6
as Part of an Evaluation Program, a Sporting

question 55

True/False

TABLE 11-6
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.
$$\begin{array} { c c c c c } \hline \text { Trial } & \text { Barth } & \text { Tornado } & \text { Reiser } & \text { Shaw } \\\hline 1 & 43 & 37 & 41 & 43 \\2 & 46 & 38 & 45 & 45 \\3 & 43 & 39 & 42 & 46\end{array}$$
-Referring to Table 11-6, based on the Tukey-Kramer procedure with an overall level of significance of 0.05, the retailer would decide that the mean speed for the Tornado brand is significantly different from each of the mean speeds for other brands.

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Definitions:

Effect Size

A quantitative measure of the magnitude of the difference between groups or the strength of a relationship between variables.

Degrees of Freedom

The total number of unique values or amounts that can be given to a statistical distribution.

Effect Size

A quantitative measure of the magnitude of a phenomenon or the strength of the relationship between variables.

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true, typically set at 0.05 or 5%.