If the standard deviation of the distribution of the difference between means is 0.76, what is the t score?
A) (15 – 23) /0.76 = –10.53
B) (0.76)(15 – 23) = –6.08
C) [(6.5 + 4.5)/2][0.76] = 4.18
D) (55 – 51) /0.76 = 5.26
D
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