The following tables list the ages, heights (in inches), and weights (in pounds) of the players on the 2009 roster for the National Hockey League teams Boston Bruins and Edmonton Oilers.

a. Compare each of the three variables€”height, weight, and age€”using either a dotplot or a histogram (use the same scale).
b. Based on what you see in the graphs in part a, can you detect a substantial difference between the two teams in regard to these three variables? Explain.
c. Explain why the data, as used in part a, are not bivariate data.

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