For a sample of n = 30 scores, X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00. What are the values for the sample mean and standard deviation?
A) ?M = 35 and s = 10
B) ?M = 30 and s = 15
C) ?M = 35 and s = 15
D) ?M = 30 and s = 10
D
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