Z-Score: Score 60, Mean 75, Standard Deviation 12
A score of 60 with mean 75 and SD 12 gives a z-score of -1.25, indicating the score is below average.
How to use this tool
- Enter data point (x), mean (μ) and standard deviation (σ) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your z-score and the full breakdown beneath it.
Compute the z-score for a below-average score of 60 when the group mean is 75 and the standard deviation is 12.
Frequently asked questions
- What does a z-score mean?
- A z-score of +1 means the value is 1 standard deviation above the mean; −2 means 2 standard deviations below. Z-scores allow comparison across different scales and distributions.