Exercise

Attributes and levels

Let's take a look the data in chocolate_wide. If you type head(chocolate_wide) you'll see we have a lot of columns. The column labeled Selection stores our observed choice, similar to the Choice variable in the sportscar data. The columns labeled Brand1, Brand2 and Brand3 show the brands of the alternatives that were included in the choice questions. Similarly Price1, Price2 and Price3 contain the prices and Type1, Type2 and Type3 show the types.

Instructions

100 XP

Use head to inspect the first rows in the data frame.
Use summary to see which Brands, Prices and Types were included in the survey.