stats

Hypothesis T-Test

One-sample, two-sample, and paired T-tests — t-stat, p-value, Cohen's d, rejection region.

Test Configuration

Test Type

Hypothesis Tail

Sample Data

Hypothesized Mean μ₀

Results

t-statistic—

Degrees of freedom—

p-value (two-tailed)—

Conclusion α = 0.05—

Conclusion α = 0.01—

Cohen's d—

t = (x̄−μ₀)/(s/√n) · Welch df for two-sample

p-value via regularized incomplete beta function
(Abramowitz & Stegun continued-fraction method)