A sports psychologist hypothesized that spacing out practice of free throws woul

Question

A sports psychologist hypothesized that spacing out practice of free throws would result in a different free throw accuracy than practicing free throws all at once. He randomly assigned 30 basketball players to either a spaced practice or concentrated practice condition, with 15 players in each condition. The spaced players practiced free throws for 15 minutes each day for 4 consecutive days; the concentrated players practiced one day for 60 minutes. On the following day he obtained each player's percentage correct from 10 free throws. The spreadsheet shows the results.

Given Problem the problem, how many pairwise comparisons are possible?

A) 25

B) 15

C) 5

D) 50

Explanation / Answer

Since there are only two treatments viz spaced practice and concentrated practice, only 1 pairwise comparison between 2 is applicable here.

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