11: Independent Samples — Read

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11.1: Difference of Means
Last chapter, we learned about mean differences, that is, the average value of difference scores. Those difference scores came from ONE group and TWO time points (or two perspectives). Now, we will deal with the difference of the means, that is, the average values of separate groups that are represented by separate descriptive statistics. This analysis involves TWO groups and ONE time point. As with all of our other tests as well, both of these analyses are concerned with a single variable.
11.2: Research Questions about Independent Means
11.3: Hypotheses and Decision Criteria
11.4: Independent Samples t-statistic
11.5: Standard Error and Pooled Variance
11.6: Movies and Mood
11.7: Effect Sizes and Confidence Intervals
11.8: Homogeneity of Variance
11.E: Independent Samples (Exercises)

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