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STATISTICS CALCULATOR
Statistical Modules
Descriptive Statistics
Enter observations separated by commas, spaces, semicolons or new lines.
Probability & Distributions
Normal Distribution
Binomial Distribution
Poisson Distribution
Z Tests
One-Sample Z Test
Two-Sample Z Test
One-Proportion Z Test
Two-Proportion Z Test
T Tests
One-Sample t Test
Independent Two-Sample t Test
Welch's t Test
Chi-Square Tests
Chi-Square Goodness-of-Fit
Chi-Square Contingency Table
Enter rows separated by semicolons and columns by commas.
One-Way ANOVA
Enter each group on a separate line. Values within each group
must be separated by commas.
Correlation
Simple Linear Regression
Non-Parametric Tests
Sign Test
Enter paired before and after values.
Wilcoxon Signed-Rank Test
Mann–Whitney U Test
Kruskal–Wallis Test
Enter each group on a separate line.
Friedman Test
Enter each subject/block as a row.
Values are the repeated measurements.
Spearman Rank Correlation
Important Formula Reference
Mean: x̄ = Σx / n
Sample variance: s² = Σ(x − x̄)² / (n − 1)
Sample SD: s = √[Σ(x − x̄)² / (n − 1)]
Z = (x̄ − μ₀) / (σ / √n)
t = (x̄ − μ₀) / (s / √n)
χ² = Σ[(O − E)² / E]
Pearson r =
Σ[(x − x̄)(y − ȳ)] /
√[Σ(x − x̄)² Σ(y − ȳ)²]
Regression: y = a + bx
One-way ANOVA: F = MSbetween / MSwithin