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,…

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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…

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…

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…

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…

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…

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…

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…

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()…

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…