Tagged: power analysis
← All topicsArticles tagged with power analysis in Stats and Cats.
- Sample Size Calculation
How to calculate required sample size for a two-sample t-test and a chi-square test, given a target effect size, significance level, and power.
- Statistical Power: Why Small Studies Often Find Nothing
Power is the probability of detecting an effect that actually exists. A study that finds nothing may simply have been too small to find anything. Here's what determines power and why it matters before collecting data.