# Anova in Stata

July 27, 2019

Doing **analysis of variance** (often refered to as ANOVA) in **Stata** is easy. Let’s begin by finding a suitable dependent variable which should be continuous and an independent categorical type variable.

Let’s load up the **nlsw88** data set and see if the mean of wage is the same across race. This is achieved by using a one-way ANOVA of wage against race. Adding the tabulate option will provide some additional information:

`oneway wage race, tabulate`

In the bottom table we can see the result of the ANOVA calculation and with a p-value of 0.000 we can safely reject the null hypothesis of equal means across the categories at test. Let’s try another example:

`oneway wage industry, tabulate`

Again we can see that wages do not seem to be equal across industries either:

Written by **Johan Osterberg** who lives and works in Gothenburg, Sweden as a developer specialized in e-commerce. Connect with me on Linkedin