What Were the Effect Sizes for the Between Group Pre

question 33

Multiple Choice

What were the effect sizes for the between group pre and post tests (see results from Q18) ?

• A) r = .11 and r = .35
• B) r = .15 and r = .42
• C) r = .21 and r = .30
• D) r = .25 and r = .30

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Definitions:

Standard Deviation

A statistic used to determine the degree of spread or variation among data values in a series.

Bimodal

Describes a distribution or data set that has two distinct modes or peaks in its frequency of occurrence.

Parameter

A numerical characteristic of a population, such as mean or standard deviation, that can be estimated by statistics calculated from a sample.

Statistic

A numerical measure that describes an aspect of a sample of data, such as its mean or variance.