P-value Calculator
The p-value is twice the upper-tail area beyond the absolute z-score under a standard normal distribution.
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How it works
The p-value is twice the upper-tail area beyond the absolute z-score under a standard normal distribution.
Worked example
A z-score of 1.96 corresponds to a two-sided p-value near 0.05.
Keep in mind
Choose a test appropriate to the data; a p-value does not measure effect size.