MGT 496 Lecture Notes - Lecture 10: Null Hypothesis
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Null hypothesis - there is no difference between groups in the scale-level outcome. Alternative/research hypothesis - there is a difference between groups in the scale-level outcome. Standardize the difference in means by accounting for the relative variation between distributions of each group. Cohen"s d = (mean2 mean 1) / sd pooled. Sd pooled = (sd2^2 + sd1^2) / 2. Small size: d value that is less than or equal to 0. 2 (d < 0. 2) Moderate or medium size: d value that ranges from 0. 2 to 0. 8. Large size: d value that is greater than 0. 8 (d > 0. 8)
