Tagged: guide
← All topicsArticles tagged with guide in Stats and Cats.
- Understanding p-values
What a p-value actually measures, the three most common misreadings, and why 0.05 is a convention rather than a fact about the world.
- Multiple Comparisons
Why testing many hypotheses inflates the false positive rate, and how family-wise error rate and false discovery rate corrections address the problem.
- 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.
- Choosing a Statistical Test
A structured decision guide for selecting the right statistical test. Covers one-sample, two-sample, multi-group, and association tests for parametric and nonparametric situations.
- Effect Size and Statistical Power
How to measure and interpret Cohen's d, eta-squared, and r. What statistical power means, what determines it, and why it belongs before data collection.
- Reading Statistical Output
How to interpret the output tables from three common analyses: independent samples t-test, one-way ANOVA, and simple linear regression.
- Sampling Methods
Simple random, stratified, cluster, systematic, and convenience sampling: when each is used, what it assumes, and what conclusions it licenses.