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Fig. 6 | BMC Medical Research Methodology

Fig. 6

From: The relationship between statistical power and predictor distribution in multilevel logistic regression: a simulation-based approach

Fig. 6

Power curves for the continuous, Level 2 predictor. Conditions of moderate (‘Mod. skew’ in the figure legend or \( \sqrt{8/5}\Big) \) and extreme (‘Extr. Skew in the figure legend or \( \sqrt{8}\Big) \) skewness are presented. The population ICC is 0.5 and the regression coefficients use a large effect size of 0.5. Power of 80% is marked with a horizontal line. The horizontal axis denotes Level 1 sample size and the vertical axis shows power. Level 2 sample sizes are shown on top of each panel (in grey). LV1 stands for Level 1 and LV2 stands for Level 2

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BMC Medical Research Methodology

ISSN: 1471-2288

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