Chapter 6: Analysing the Data |
Eta-Square (^{2})A calculation in the t-test family that is analogous to r^{2} in correlation and regression is eta-square (^{2}). This number can be interpreted in exactly the same way as r^{2}. Therefore an ^{2} = .367 means that 36.7% of the variability in the dependent variable can be explained or accounted for by, the independent variable. Eta-square should be routinely calculated for t-tests and ANOVA as part of the Evaluate step of the process and reported in the summary statement in Step 5. Eta-square is probably not of much use in the single sample t-test. It is calculated by |
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