SCENARIO 10-3
as Part of an Evaluation Program, a Sporting

question 148

Short Answer

SCENARIO 10-3
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. $\begin{array}{lllll}\text { Trial}&\text { Barth}&\text { Tornado }&\text {Reiser}&\text { Shaw }\\1 & 43 & 37 & 41 & 43 \\2 & 46 & 38 & 45 & 45 \\3 & 43 & 39 & 42 & 46\end{array}$
-Referring to SCENARIO 10-3, in testing the null hypothesis that the mean downhill coasting speeds of the 4 brands of bicycles are equal, the value of the test statistic is .

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Definitions:

Experimental Research

A research method involving the manipulation of variables to establish cause-and-effect relationships.

Cause and Effect

The principle that actions or events lead to a certain consequence or outcome, wherein the cause is why something happens, and the effect is what happens.

Arithmetic Mean

The sum of a set of numerical values divided by the number of values in the set, commonly known as the average.

Average

A statistical measure representing the central or typical value in a set of data, calculated mainly as the mean or median.