At a camp cafeteria teenagers were randomly given a tall skinny glass or a short wide glass. As they proceeded through the line they loaded up on the food they wanted and poured whatever drink they chose. At the end of the line the amount of drink they had in their glasses were recorded. Can we infer that the amounts in the short wide glass contained were greater than the amounts in the tall skinny glasses? (Source: Adapted from Abby Ellin, “For Overweight Children, Are ’Fat Camps’ a Solution?” New York Times, June 2005.)
Exercises 13.217 and 13.218 require access to the data files introduced in previous exercises.

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