A set of data has a mean of 0 point 5 and a standard deviation of 0 point 0 1 A data point of the set has a z -score of 2 point 5 What does a z -score of 2 point 5 mean?

A z-score tells how many standard deviations a data point is from the mean. Here, the mean is 0.5 and the z-score is 2.5, so the data point is 2.5 standard deviations above the mean. Therefore, choice C, “2.5 standard deviations away from 0.5,” is correct.

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