Exercise

ANOVA test

In this exercise, we'll run the ANOVA test and analyze its outcome. Execute the code now and investigate the output.

Let’s examine the output: First, we have a numerical response variable (score on vocabulary test) and a categorical explanatory variable (class). Since class has four levels, comparing average scores across the levels of the class variable requires ANOVA.

Before we get to the ANOVA output we are presented with a series of summary statistics and the associated hypotheses.

Note that the alternative hypothesis is set to greater because F-tests are always onesided.

Instructions

100 XP

Run the code and carefully read the exercise to examine the ANOVA output.