Instruction 11-3
as Part of an Evaluation Program, a Sporting

question 53

Short Answer

Instruction 11-3
As part of an evaluation program, a sporting goods retailer wanted to compare the downhill coasting speeds of four brands of bicycles. She recorded three trials of each brand and determined their maximum downhill speeds. The results are presented in kilometres per hour in the table below.
$$\begin{array} { | l | l | l | l | l | } \hline \text { Trial } & \text { Barth } & \text { Tornado } & \text { Reiser } & \text { Shaw } \\\hline 1 & 43 & 37 & 41 & 43 \\\hline 2 & 46 & 38 & 45 & 45 \\\hline 3 & 43 & 39 & 42 & 46 \\\hline\end{array}$$
-Referring to Instruction 11-3,what is the critical value of Levene's test for homogeneity of variances at a 5% level of significance?

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Definitions:

Double-blind Studies

Research designs in which neither the participants nor the experimenters know who is receiving a particular treatment, reducing biases.

Placebo Effect

The phenomenon in which a person's condition appears to improve after taking a placebo, a treatment that has no therapeutic effect, due to the individual's belief in the treatment's efficacy.

Experimenter Effect

A phenomenon where the biases or expectations of the experimenter inadvertently influence the outcome of an experiment.

Random Assignment

A method used in experiments to evenly distribute participants across various groups, ensuring that each has an equal chance of being assigned to any group.