P-Value Calculator – Financial Calculators

Math Calculators P-Value Calculator Calculate p-values for z-scores and t-scores with precise tail test types.

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What is the P-Value Calculator & How does it work?

The p-value is a measure of the probability that an observed result occurred by chance under the null hypothesis. Small values warrant rejection of the null hypothesis.

Two-Tailed: $p = 2 \times (1 – \Phi(|x|))$

$\Phi(x)$ = Cumulative Distribution Function
$x$ = Absolute experimental test score ($Z$ or $t$)

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Parameters

Distribution Type

Score Value ($z$ or $t$)

score

Test Direction

Degrees of Freedom ($df$)

Computed P-value —

Results are for informational purposes only and do not constitute professional advice.