Mathematics

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8 January, 17:13

6. Active is an energy drink that claims to provide physical strength. To test this claim, the

producers of Active conducted a study. The company recruited 25 high school athletes and 4

professional football players to participate in the study. The high school athletes were each

randomly assigned to drink between 1 and 5 ounces of Active. The professional football

players were assigned to drink either 30 or 31 ounces. After waiting 10 minutes they

completed as many pull-ups as they could. Here is a scatterplot showing the number of

energy drinks consumed and the number of pull ups that were completed by each participant,

as well as a line of best fit.

Which of the following would increase if

the professional football players were

removed from the data set?

umber of Pull Ups

(A) r

(B) r^2

(C) the slope

(D) the standard deviation of the residuals

(E) None of the above.