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

question 60

Short Answer

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, what are the numerator and denominator degrees of freedom for Levene's test for homogeneity of variances respectively?

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Definitions:

Systematic Influence

Factors that consistently affect measurements across the entire dataset, leading to potential bias or error in research findings.

Statistical Test

A procedure for determining whether an observed pattern in data differs significantly from what would be expected under a certain hypothesis, often used to assess the probability of observing the given data by chance.

Null Hypothesis

A hypothesis that assumes no statistical significance exists in a set of given observations, aiming to be disproven.

Normal Curve

A bell-shaped curve that represents the distribution of data about a mean in a symmetrical pattern, indicating normal distribution in statistics.