TABLE 11-6
as Part of an Evaluation Program

question 76

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.
$$\begin{array} { c c c c c } \hline \text { Trial } & \text { Barth } & \text { Tornado } & \text { Reiser } & \text { Shaw } \\\hline 1 & 43 & 37 & 41 & 43 \\2 & 46 & 38 & 45 & 45 \\3 & 43 & 39 & 42 & 46\\\hline\end{array}$$
-Referring to Table 11-6, the null hypothesis that the average downhill coasting speeds of the 4 brands of bicycles are equal will be rejected at a level of significance of 0.05 if the value of the test statistic is greater than____ .

---

Definitions:

Parameter λ

Often used to denote a rate parameter in exponential distributions which quantifies the frequency of occurrence for a given event.

Normally Distributed

A type of distribution for a variable where data are symmetrically distributed around the mean, showing a bell-shaped curve.

Average Balance

The mean amount of money held in an account over a certain period.

Standard Deviation

An index of variability that quantifies the spread of a set of numbers or the dispersion from the average.