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Plotting results

In the previous exercises, you have examined the raw data, used the data to build a model, and applied the model for statistical inferences. You found drug 2 increased the amount of extra sleep compared to drug 1. During this exercise, you will plot the results to see how much drug 2 increased extra sleep.

First, wrangle the data by using pivot_wider() function from the tidyr package. Then, calculate the difference in extra sleep for each individual. Last, plot this difference as a histogram.

Cet exercice fait partie du cours

Hierarchical and Mixed Effects Models in R

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Exercice interactif pratique

Essayez cet exercice en complétant cet exemple de code.

# Load the tidyr package
library(___)

# Make the data wider
___ <- 
	pivot_wider(sleep, 
                names_from = group, values_from = extra)

# Calculate the difference 
sleep_wide$___ <- sleep_wide$`2` - sleep_wide$`1`
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