Z-score Calculator
Measure distance from the mean in standard deviations; standard deviation must be positive.
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Measure distance from the mean in standard deviations; standard deviation must be positive.
Worked example
Inputs
- Observed value x: 85
- Mean: 70
- Population standard deviation: 10
Results
- Z-score: 1.5
Measure distance from the mean in standard deviations; standard deviation must be positive.
Reviewed:Common uses
Measure distance from the mean in standard deviations; standard deviation must be positive.
BEHIND THE NUMBERSFormula & assumptions
z=(x−μ)/σ
Measure distance from the mean in standard deviations; standard deviation must be positive.