# How to Perform a Repeated Measures ANOVA By Hand

A repeated measures ANOVA is used to determine whether or not there is a statistically significant difference between the means of three or more groups in which…

# How to Perform the Wilcoxon Signed-Rank Test in R

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

# A Guide to dgeom, pgeom, qgeom, and rgeom in R

This tutorial explains how to work with the geometric distribution in R using the following functions dgeom: returns the value of the geometric probability density…

# How to Perform a One-Way ANOVA by Hand

A one-way ANOVA (“analysis of variance”) compares the means of three or more independent groups to determine if there is a statistically significant difference between…

# Wilcoxon Signed-Rank Test Calculator

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

# Friedman Test: Definition, Formula, and Example

The Friedman Test is a non-parametric alternative to the Repeated Measures ANOVA. It is used to determine whether or not there is a statistically significant difference between the means…

# How to Perform a Two-Way ANOVA in Excel

A two-way ANOVA (“analysis of variance”) is used to determine whether or not there is a statistically significant difference between the means of three or more…

# An Introduction to the Multinomial Distribution

The multinomial distribution describes the probability of obtaining a specific number of counts for k different outcomes, when each outcome has a fixed probability of…

# An Introduction to the Negative Binomial Distribution

The negative binomial distribution describes the probability of experiencing a certain amount of failures before experiencing a certain amount of successes in a series of Bernoulli trials.…

# Multinomial Distribution Calculator

The multinomial distribution describes the probability of obtaining a specific number of counts for k different outcomes, when each outcome has a fixed probability of…