8. A t-test can be two-tailed, in which any difference found is accepted, or one-tailed, in which...

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8. A t-test can be two-tailed, in which any difference found is accepted, or one-tailed, in which the direction of the difference is specified by the research question or hypothesis. 9. Analysis of variance, or ANOVA, compares the influence of two or more groups of the independent variable on the dependent variable.

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