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Fit one model or several models to maximize power for significance testing of slopes in a factorial design?
Problem
I need to perform a power analysis for a set of statistical tests. Each test is about a regression slope computed in a cell of a factorial experiment design. To minimize the required sample ...
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How to compute Cohen's d and p-value for comparison of least squares mean from two different mixed models?
I have two randomly assigned treatment interventions (A and B), and two subgroups of individuals (X and Y). This is a longitudinal study with dropout. I want to test whether the outcomes of ...
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