Hypothesis Test Calculator

Perform Z and T hypothesis tests with p-values, critical values, and statistical decisions.

Enter Test Parameters

Select test type and enter values

Test Type

Alternative Hypothesis

Sample 1 Data

Sample Mean (x̄₁)

Sample Size (n₁)

Sample 2 Data

Sample Mean (x̄₂)

Sample Size (n₂)

Significance Level (α)

Test Statistic

p-value

Critical Value

Decision

🔴 Reject H₀ 🟢 Fail to Reject H₀

(p < α: Evidence against null hypothesis) (p ≥ α: Insufficient evidence)

Enter test parameters above and tap Perform Test.

Step-by-step Solution

Common α Levels

α = 0.10

90% confidence

α = 0.05

95% confidence

α = 0.01

99% confidence

How to Interpret

Reject H₀: The data provides sufficient evidence against the null hypothesis at the chosen significance level.

Fail to Reject: Insufficient evidence to reject the null hypothesis. This does not prove H₀ is true.

p-value: Lower p-values indicate stronger evidence against H₀.

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