A set of scores has a mean of 60 and a standard deviation of 12. What is the -score of a score of 78?

Answer and explanation

Correct answer: C. 1.5

  1. Step 1: . Answer: 1.5. Why not the others: -1.5: reverses the sign. 18: forgets to divide by the standard deviation. 6.5: divides the score by the standard deviation.

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