R Statistics Cookbook

How to do it...

In the following example, we will load scores (Math, History, and Physics) for two classes and we will be interested in assessing whether the means are the same or not between them:

1. First, we will load the Hotelling library and the two datasets that we will work with:

library(Hotelling)data1 = read.csv("./class1.csv")data2 = read.csv("./class2.csv")sapply(data1,mean)sapply(data2,mean)

The preceding code generate the following output:

2. There is a clear difference between the two groups, Math between Physics, and a negligible one for History. We still need to do a formal test to determine whether the scores differ by group. ...