====== WebPower Manual ======
WebPower is a collection of tools for conducting [[kb:statistical power analysis]] online. WebPower can be used by anyone for free. To use the software now, [[models:index|click here]]. For a short tutorial on how to use WebPower, [[manual:getstarted:index|click here]]. For the free online manual book (more than 30MB), please {{:grant:webpower_manual_book.pdf|click here}}. To order a hard copy of the book, click the book cover below: \\ [[https://www.amazon.com/Practical-Statistical-Power-Analysis-WebPower/dp/1946728020/|{{:webpower.jpg?200|}}]]

To cite WebPower, please use:

Zhang, Z., & Yuan, K.-H. (2018). //Practical Statistical Power Analysis Using Webpower and R// (Eds). Granger, IN: ISDSA Press.
===== Power analysis through Monte Carlo simulation =====
  * [[Diagram based power analysis]]
===== Correlation =====
  * [[Correlation based on Z-test]]

===== Proportion =====
  * [[One sample proportion]]
  * [[Two sample proportion, equal sample size]]
  * [[Two sample proportion, unequal sample size]]

===== Means =====
  * [[Power of t-test]]
  * [[power_of_t2n-test|Power of t test (Unbalanced sample sizes)]]
  * [[Balanced one-way ANOVA]]
  * [[power_of_nanova|Two-way and three-way ANOVA with interaction]]
  * [[power_of_RManova|Repeated-measures ANOVA]]
  
===== Correlation and Regression =====
  * [[Linear regression]]
  * Logistic regression
  * Poisson regression

===== Mediation analysis =====
===== Multilevel modeling =====

===== Longitudinal data analysis =====
  * [[Sample size calculation for a mixed model of repeated measures with general correlation structure]]
  * [[Statistical power for a mixed model of repeated measures with AR(1) correlation structure]]
===== Structural equation modeling =====
  * [[Power analysis based on RMSEA (MacCallum et al., 1996)]]
  * [[Power analysis using Satorra & Saris (1985)]]
===== Example data sets =====
  * {{:manual:anovadata1.txt|ANOVA example data set 1}}