Created by Harvey Motulsky for GraphPad Software, this page provides a table for selecting an appropriate statistical method based on type of data and what information is desired from the data. It also compares parametric and nonparametric tests, one-sided and two-sided p-values, paired and unpaired tests, Fisher's test and the Chi-square test, and regression and correlation. It comes from Chapter thirty-seven of the textbook, "Intuitive Biostatistics".