If 15 research participants take a pretest and a posttest with a mean change score of 1.5, and if the standard deviation of the comparison distribution is .5, what is the t score?
A) 1.5/(15 ??1 ) = .11
B) 1.5/15 = .10
C) 1.5/.5 = 3.00
D) 15/1.5 = 10
C
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