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11 Cards in this Set
- Front
- Back
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Test of Differences
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An investigation of a hypothesis stating that two (or more) groups differ with respect to measures on a variable
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Independent Samples t-test
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A test for hypotheses stating that the mean score for some interval- or ratio-scaled variable grouped based on some less-than interval classificatory variable
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Pooled Estimate of the Standard Error
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An estimate of the standard error for a t-test of independent means that assumes the variances of both groups are equal
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Paired -Samples t-test
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An appropriate test for comparing the scores of two interval variables drawn from related populations
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Z-test for differences of proportions
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A technique used to test the hypothesis that proportions are significantly different for two independent sample groups
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Analysis of Variance (ANOVA)
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Analysis involving the investigation of the effects of one treatment variable on an interval-scaled dependent variable -- a hypothesis-testing technique to determine whether statistically significant differences in means occur between two or more groups
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Grand Mean
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The mean of a variable over all observations
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Between-Group Variances
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The sum of differences between the group mean and the grand mean summed over all groups for a given set of observations
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Within-group Error or Variance
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The sum of the difference between observed values and the group mean for a given set of obersvations; also known as total error variance
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F-test
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A procedure used to determine whether there is more variability in the scores of one sample than tin the scores of another sample
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Total Variability
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The sum of within-group variance and between-groups variance
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