Exercise

The by function

The box plots show how the medians of the two distributions compare, but we can also compare the means of the distributions using the by() function to split the weight variable into the habit groups, and then take the mean of each using the mean() function.

You can use the by() function as follows to compare the means of the groups: by(numerical_dataset, categorical_dataset, mean).

You can also use other functions like median, summary, etc.

Instructions

100 XP

Use the by() function to find out how the means of the distributions compare.

Take Hint (-30 XP)