One Sample T Test Alculator Calculator

One-Sample t-Test

Tests whether the sample mean differs from a known value μ using t = (x̄ − μ) / (s / √n).

Formula

t = (x̄ − μ) / (s / √n), df = n − 1

Example

x̄=52, μ=50, s=6, n=25 → t = (2) / (6/5) ≈ 1.67.

FAQs

Assumptions?
Normality of the underlying population or large n.

One- vs two-sided?
Choose based on hypothesis direction.