# How to Create & Interpret a Q-Q Plot in R

This tutorial explains how to create and interpret a Q-Q plot in R. What is a Q-Q Plot? A Q-Q plot, short for quantile-quantile plot,…

# How to Conduct Levene’s Test for Equality of Variances in R

This tutorial explains how to easily conduct Levene’s test for equality of variances in R. What is Levene’s Test? In many statistical tests, like a…

# How to Find Conditional Relative Frequency in a Two-Way Table

This tutorial explains how to easily find conditional relative frequencies in a two-way table. What is a Two-Way Frequency Table? A two-way frequency table is…

# How to Identify Influential Data Points Using Cook’s Distance

Cook’s distance, often denoted Di, is used in Regression Analysis to identify influential data points that may negatively affect your regression model. The formula for…

# A Simple Guide to Multiple Linear Regression in R

This guide walks through an example of how to conduct multiple linear regression in R, including: Examining the data before fitting the model Fitting the…

# A Complete Guide to the Best ggplot2 Themes

This tutorial provides a complete guide to the best ggplot2 themes, including: How to modify the appearance of plots using built-in ggplot2 themes. How to…

# How to Easily Calculate Variance Inflation Factor (VIF) in R

This tutorial explains how to calculate VIF in R, which is a metric that can be used to detect multicollinearity in a regression model. What…

# Relative Standard Deviation Calculator

The relative standard deviation of a set of numbers is a special form of the standard deviation. It is calculated as: Relative standard deviation: 100…

# How to Use the abline() Function in R to Add Straight Lines to Plots

This tutorial explains how to use the abline() function in R to add one or more straight lines to a plot in R. The abline()…

# How to Find the Standard Error of the Mean in R

This tutorial explains several ways to easily find the standard error of the mean in R. What is the Standard Error of the Mean? The…