Why does the z score have to be positive?
Question
Why does the z score have to be positive?
Solution
The Z score doesn't always have to be positive. The Z score is a statistical measurement that describes a value's relationship to the mean of a group of values. It is measured in terms of standard deviations from the mean. If a Z score is 0, it indicates that the data point's score is identical to the mean score. A Z score of 1.0 would indicate a value that is one standard deviation from the mean. Z scores may be positive or negative, with a positive value indicating the score is above the mean and a negative score indicating it is below the mean.
Similar Questions
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The mean of a z-score is always zero. Does this mean that half of a set of z scores will be negative and half positive? Explain.
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