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Fig. 17 | BMC Medical Research Methodology

Fig. 17

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

Fig. 17

Power curves for continuous, skewed Level 1 predictor (skewness= \( \sqrt{8}\Big) \) and balanced, categorical Level 2 predictor (50% incidence). The population ICC is 0.3 and the regression coefficients use medium effect sizes (0.3 for continuous predictor and 0.5 for the categorical predictor). Power of 80% is marked with a horizontal line. Horizontal axis denotes Level 1 sample size and 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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