Z Score Review

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What is a Z-score?

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A Z-score indicates how many standard deviations an element is from the mean of a data set.

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What does a negative Z-score indicate?

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A negative Z-score indicates that the score is below the mean.

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What does a positive Z-score indicate?

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A positive Z-score indicates that the score is above the mean.

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How do you calculate a Z-score?

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Front

If a student's score is 70, the class average is 75, and the standard deviation is 5, what is the Z-score?

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Front

What does a Z-score of 0 mean?

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A Z-score of 0 means the score is exactly at the mean.

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What is the significance of a Z-score of +2?

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A Z-score of +2 means the score is 2 standard deviations above the mean.

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What is the significance of a Z-score of -2?

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A Z-score of -2 means the score is 2 standard deviations below the mean.

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If the mean is 50 and the standard deviation is 10, what is the Z-score for a score of 60?

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Front

What is the Z-score for a score of 45 if the mean is 50 and the standard deviation is 5?

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