A set of data has a mean of 12 and a standard deviation of 3. A data point of the set has a z-score of 1.3. What does a z-score of 1.3 mean?

A z-score tells how many standard deviations a data point is from the mean. Here the mean is 12, so a z-score of 1.3 means the data point is 1.3 standard deviations above 12. Therefore, the correct choice is “The data point is 1.3 standard deviations away from 12.”

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