T-Test Calculator
Perform one-sample, two-sample, and paired t-tests. Calculate test statistics, p-values, and effect sizes.
Test Configuration
One-Sample t-Test
About t-Tests
  • One-sample: Compare sample mean to known population mean
  • Two-sample: Compare means of two independent groups
  • Paired: Compare means of matched pairs (before/after)

Assumptions: Normal distribution (or large n), independent observations, continuous data.

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