Topic Non-parametric Methods

If you are tracking the exact same subjects across two different points in time—like a patient’s blood pressure before and after a new medication—you typically use a Paired T-Test. But just like the standard t-test, the paired t-test assumes your…

When you want to compare the averages of two independent groups (like test scores from Class A vs. Class B), the standard go-to tool is the independent t-test. However, the t-test has a strict rule: your data must be roughly…

Most of the statistical tests you first learn—like the t-test, ANOVA, or Pearson correlation—are parametric tests. Parametric tests are incredibly powerful, but they are also prima donnas. They demand that your data meet a strict set of assumptions. The most…