🧪 One-Sample T-Test
Test a sample mean against a target value
About this calculator
The one-sample t-test checks whether your sample mean differs enough from a target value to matter, accounting for sample size and spread. It returns the t-statistic, degrees of freedom, and a plain-English verdict at the 5 percent level.
Tip: a significant result with a tiny sample can be a fluke, so always look at the actual difference too, not just the verdict.