Exercise

Do people choose lower prices?

Remember I said I like to look at choice counts for every attribute? Well, we have one last attribute we should look at in the chocolate data: Price. The syntax for xtabs() is the same, so let's see if you can remember it on your own this time.

Instructions

100 XP

Use xtabs to compute the counts for Price and Selection for the chocolate data. Assign the result to counts.
Plot the results.
Inspect the plot. Do people tend to choose lower prices?

Take Hint (-30 XP)