PSYC 217 Lecture Notes - Lecture 21: Nootropic, Dependent And Independent Variables
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It is when you want to compare the means of a normally distributed interval dependent variable. ex. if mean is same for sports efficiency for males and females. Used to test equality of variance. used to test hypothesis of equality of 2 population variances. equality of several means. Ratio of systematic variance (measures as the difference between groups, for ex. comparing means of a set of samples)! Measure test scores between students taking adderal and students on no drugs, controlling for everything else. Bigger differences between groups may reflect stronger effect of your manipulation. High variability in a group reduces potential differences between groups. You divide the variability between (effect) by the variability within (error), and that is your t-value! People who make more eye contact are more likeable.
