# WebPower v0.5

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## Basic and Advanced Statistical Power Analysis

This is a collection of tools for conducting both basic and advanced statistical power analysis including correlation, proportion, t-test, one-way ANOVA, two-way ANOVA, linear regression, logistic regression, Poisson regression, mediation analysis, longitudinal data analysis, structural equation modeling and multilevel modeling. It also serves as the engine for conducting power analysis online at <https://webpower.psychstat.org>.

## Functions in WebPower

 Name Description WebPower-package Basic and Advanced Statistical Power Analysis wp.effect.CRT2arm Effect size calculatator based on raw data for Cluster Randomized Trials with 2 Arms summary.power Summary Statistical Power Analysis Results wp.anova Statistical Power Analysis for One-way ANOVA wp.anova.count Statistical Power Analysis for One-way ANOVA with Count Data wp.effect.CRT3arm Effect size calculatator based on raw data for Cluster Randomized Trials with 3 Arms wp.sem.chisq Statistical Power Analysis for Structural Equation Modeling based on Chi-Squared Test wp.mc.t Power analysis for t-test based on Monte Carlo simulation wp.logistic Statistical Power Analysis for Logistic Regression wp.mediation Statistical Power Analysis for Simple Mediation wp.mc.sem.basic Statistical Power Analysis for Structural Equation Modeling / Mediation based on Monte Carlo Simulation plot.lcs.power Plot the power curve for Latent Change Score Models wp.regression Statistical Power Analysis for Linear Regression wp.blcsm Statistical Power Curve for Bivariate Latent Change Score Models based on Monte Carlo Simulation wp.sem.rmsea Statistical Power Analysis for Structural Equation Modeling based on RMSEA wp.kanova Power analysis for two-way, three-way and k-way ANOVA wp.lcsm Statistical Power Curve for Univariate Latent Change Score Models based on Monte Carlo Simulation wp.correlation Statistical Power Analysis for Correlation wp.mrt2arm Statistical Power Analysis for Multisite Randomized Trials with 2 Arms wp.mmrm Power analysis for longitudinal data analysis wp.t Statistical Power Analysis for t-Tests wp.rmanova Statistical Power Analysis for Repeated Measures ANOVA wp.effect.MRT2arm Effect size calculatator based on raw data for Multisite Randomized Trials with 2 Arms wp.effect.MRT3arm Effect size calculatator based on raw data for Multisite Randomized Trials with 3 Arms wp.popPar Extract Population Value Table wp.mc.sem.boot Statistical Power Analysis for Structural Equation Modeling / Mediation based on Monte Carlo Simulation: bootstrap method wp.mc.sem.power.curve Statistical Power Curve for Structural Equation Modeling / Mediation based on Monte Carlo Simulation wp.mrt3arm Statistical Power Analysis for Multisite Randomized Trials with 3 Arms wp.poisson Statistical Power Analysis for Poisson Regression wp.prop Statistical Power Analysis for Tests of Proportions nuniroot Sove An Single Equation estCRT2arm Estimate multilevel effect size from data plot.webpower To plot Statistical Power Curve MRT2 Example Data For MRT With 2 Arms wp.anova.binary Statistical Power Analysis for One-way ANOVA with Binary Data MRT3 Example Data For MRT With 3 Arms wp.crt2arm Statistical Power Analysis for Cluster Randomized Trials with 2 Arms CRT3 Example Data For CRT With 3 Arms wp.crt3arm Statistical Power Analysis for Cluster Randomized Trials with 3 Arms CRT2 Example Data For CRT With 2 Arms print.webpower To Print Statistical Power Analysis Results No Results!