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Numerical simulation

Similar to before, figure 5 shows the expected percentage increase in $ Z$-score for the heteroscedastic vs. the homoscedastic model. Again, depending on the explicit configurations of first-level variances, a substantial increase in $ Z$-score can be observed.

Figure 5: Expected % increase in $ Z$-score for the paired $ t$-test at different group sizes (N=6, 12 and 30). Boxplots show the standard deviation of the paired differences.

Christian Beckmann 2003-07-16