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Hypothesis Testing Calculator

Perform statistical hypothesis tests using z-tests or t-tests. Choose one-tailed or two-tailed tests, calculate p-values, and visualize your test statistic on the distribution curve.

Hypothesis Test Setup

Test Type

Tail Type

Sample mean

Population Mean

Standard Deviation

Sample Size (n)

Significance Level

Results

Enter values and click Calculate to see the result.

Theory & Formula

Hypothesis Testing

Hypothesis testing is a statistical method for making decisions about population parameters based on sample data.

Steps

State the null hypothesis (H₀) and alternative hypothesis (Hₐ)
Choose the significance level (α)
Calculate the test statistic
Determine the p-value
Make a decision: reject H₀ if p-value < α

Z-test formula

\(z = \frac{\bar{x} - \mu_0}{\sigma / \sqrt{n}}\)