Statistics Calculator

Descriptive statistics, histogram, and t-tests (one-sample and Welch two-sample) from pasted data

Sample A (comma/space/newline separated)

12.1, 13.4, 11.8, 12.9, 13.1, 12.5, 12.2, 13.0, 12.7, 11.9, 12.4, 12.8

Sample B (optional — enables two-sample t-test)

One-sample test vs μ₀ =

Statistic	Sample A
n	12
Mean	12.5667
Std dev (sample)	0.501513
Std error	0.144774
Median	12.6
Q1 / Q3	12.175 / 12.925
Min / Max	11.8 / 13.4
95% CI (mean)	12.2829 – 12.8504

Histogram (Sample A)

One-sample t-test (H₀: μ = 12)

t(11) = 3.9141 · p = 0.0024

Significant at α = 0.05 — reject H₀.

From raw data to p-values

Paste measurements straight from a lab notebook or spreadsheet and get descriptive statistics, a histogram, and hypothesis tests. The two-sample comparison uses Welch's t-test (no equal-variance assumption) with Welch–Satterthwaite degrees of freedom; p-values come from an exact Student-t CDF computed in your browser. Remember: statistical significance is not the same as practical importance — always look at the effect size.

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