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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?
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