Determining What You Can Determine

Avoiding a Terrible Error

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Additional Resources

Here are some additional resources that may help in deconstructing power

• pwr Vingette. A how-to guide covering all of the functionality in the pwr package

• Power Analysis in R. A highly detailed walkthrough addressing power analysis in R starting at the basics through some advanced techniques

• Power, Effect Size, and P-Values. A detailed introduction to power that is very readable

• Power and Sample Size Calculations A presentation that gives you a chance to learn/review statistical power from the ground up while interactively changing design parameters

• Statistical Power Analysis Online. An alternative to the pwr package, this tutorial covers the webpower package

• Statistical Power and Why It Matters | A Simple Introduction. A well written description on Scribbr of power and its related components

• Statistical Power in a two-sample test. Ain interactive demo application that allows you to edit study parameters in order to observe changes in power