Exercise

Plotting opportunity cost

Again, interest is in whether the treatment and control groups were equally likely to buy a DVD after reading the experimental statements. Here, you'll create a barplot to visualize the difference in proportions between the treatment and control groups.

Instructions

100 XP

Using the opportunity dataset, plot group filled by decision.
Call geom_bar() to add a bar plot layer, setting the position argument to "fill" to compare relative frequencies. Note that fill should be defined by the decision for each group.