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on-a-test-with-a-mean-of-80-and-a-standard-deviation-of-20-an-individual-with-a-score-of-60-will-have-a-z-score-of

On a test with a mean of 80 and a standard deviation of 20, an individual with a score of 60 will have a z-score of

[A] 0.1

[B] 1.0

[C] -0.1

[D] -1.0

Answer & Explanation
Answer: -1.0