# Comparing Groups

Let’s explore the different group comparisons.

## We'll cover the following

R functionality to compare groups

We’ve used the `mean()`

, `var()`

, and `sd()`

functions to calculate the overall mean, variance, and standard deviation for the heights of all 30 plants from the `darwin`

data frame. We can do the same for the two experimental treatments using the `Cross`

and `Self`

columns in the wide format dataset (the data frame from the `Sleuth`

package). This is shown in the code snippet below:

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