The Wilcoxon Signed-Rank Test is the non-parametric version of the paired samples t-test. It is used to test whether or not there is a significant difference between two population…

# Author: Zach

A paired samples t-test is used to compare the means of two samples when each observation in one sample can be paired with an observation in the other…

A Mann-Whitney U test (sometimes called the Wilcoxon rank-sum test) is used to compare the differences between two samples when the sample distributions are not normally distributed…

A two sample t-test is used to test whether or not the means of two populations are equal. This tutorial explains how to conduct a two sample…

A one sample t-test is used to test whether or not the mean of a population is equal to some value. This tutorial explains how to conduct…

Levene’s Test is used to determine whether two or more groups have equal variances. It is commonly used because many statistical tests make the assumption that…

The Jarque-Bera test is a goodness-of-fit test that determines whether or not sample data have skewness and kurtosis that matches a normal distribution. The test…

A Chi-Square Test of Independence is used to determine whether or not there is a significant association between two categorical variables. This tutorial explains how to perform a…

A Chi-Square Goodness of Fit Test is used to determine whether or not a categorical variable follows a hypothesized distribution. This tutorial explains how to perform a Chi-Square…

Fisher’s Exact Test is used to determine whether or not there is a significant association between two categorical variables. It is typically used as an alternative to…