If an Independent T Ratio Is to Be Calculated for a Two-Group

question 12

Multiple Choice

If an independent t ratio is to be calculated for a two-group design, 20 subjects in each group, then the degrees of freedom equal

• A) 1
• B) .05
• C) 40
• D) 38

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Definitions:

F Value

A statistic obtained in analysis of variance (ANOVA) testing, used to determine whether the means of several groups are equal or show significant differences.

F-Tests

A group of statistical tests that compute the ratio of variances to analyze the statistical significance of the differences between means.

Nondirectional

Pertains to hypotheses or tests that do not specify a direction of effect but instead test for any difference or association.

Type II Error

The probability of accepting a null hypothesis when it is false.