Z Score Calculator
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This simple calculator allows you to calculate a standardized z-score for any raw value of X. Just enter your raw score, population mean and standard deviation, and hit "Calculate Z".
Note: If you already know the value of z, and want to calculate p, this calculator will do the job.
| Raw Score (X): |
| Population Mean (μ): |
| Standard Deviation (σ): |
Please enter your values above, and then hit the calculate button.
Calculate Z from P
This second calculator allows you to calculate the z-score for any given cummulative probability level (simply put, for any given value of p). Just enter your p-value, which must be between 0 and 1, and then hit the button below.
| P-value: |
Please enter the value of p above, and then press "Calculate Z from P".
Additional Z Statistic Calculators
If you're interested in using the z statistic for hypothesis testing, then we have a couple of other calculators that might help you.
Z-Test Calculator for a Single Sample Z-Test Calculator for 2 Population Proportions
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