Z Score Calculator
To get the result, fill out the calculator form and press the Calculate button.
What is the Z Score?
Z-score is a statistical measurement that describes a value's relationship to the mean of a group of values. Z-score 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.
Z Score Formula
- Z denotes to sample Z Score
- X is the data point's
- µ is the population mean
- σ is the population standard deviation
Population Z Score formula
- σ denotes to population Z Score
- N is the number of observations
- x_{i} is the observed values of the population item
- μ is the mean value of the population
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