Z-Score Understanding Quiz
Test your knowledge of Z-scores, their calculation, and interpretation.
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Which of the following best describes a Z-score?
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It measures how many standard deviations a value is from the mean.
It is the sum of all data points divided by the number of data points.
It is the median of a data set.
Other
Given a data set with a mean of 100 and a standard deviation of 15, what is the Z-score for a value of 130?
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Interpret the meaning of a Z-score of -2 in a normal distribution.
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The value is 2 standard deviations below the mean.
The value is 2 standard deviations above the mean.
The value is at the mean.
Other
The formula for calculating a Z-score is
Formula for Z-score
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Briefly explain how Z-scores are useful in comparing scores from different distributions.
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