Statistics

15 tools · Distribution tables, critical values, p-values, and hypothesis-test calculators that run in your browser. Pair with Math tools for lighter z/t helpers.

Statistics Hub will host distribution tables (t, z, chi-square, F), critical-value and p-value lookup, and hypothesis-test calculators that run entirely in your browser. Tables and tests are still shipping; this page is the empty hub so navigation, sitemap, and llms.txt can wire up before individual tools land.

Until table pages publish, use Math tools for lighter entry points: z-score, t-score, normal distribution, chi-square statistic, hypothesis-test, and confidence-interval helpers under /math. Those pages stay at their current URLs and will cross-link here once Statistics tools go live.

For raw data exploration, regression, and CSV profiling, open Data Lab. For scripted scipy-style workflows, open Coding Studio. Nothing on this hub uploads your dataset to UtilBloom servers.

Educational use only. Critical values and p-values will be computed from tested distribution functions—not hard-coded textbook excerpts—when the calculators ship.

Questions

Where are the t and chi-square tables?

They are planned under /statistics (for example /statistics/t-table). Until then, use /math/t-score, /math/normal-distribution, and /math/chi-square-calculator.

Will Math statistics URLs move?

No. Existing /math/* statistics helpers keep their paths. New Statistics Hub pages will differentiate (full tables, p-values, APA-style sentences) and cross-link both ways.

Can I run tests on a pasted CSV here?

Not on this empty hub. Use Data Lab for cleaning and Coding Studio for notebook-style tests until Statistics calculators publish.

Are results private?

Studio and Math calculators are built to run in the tab. Prefer synthetic data on shared machines.

Statistics
T-Table
Student's t critical values and p-values by degrees of freedom, with reverse lookup.
Statistics
Z-Table
Standard normal critical values and cumulative probabilities, with reverse lookup.
Statistics
Chi-Square Table
Chi-square critical values and p-values by degrees of freedom, with reverse lookup.
Statistics
F-Table
F-distribution critical values by numerator/denominator degrees of freedom, with reverse lookup.
Statistics
Critical Value Calculator
Critical values for z, t, chi-square, or F at any alpha and tail.
Statistics
P-Value Calculator
P-value from a z, t, chi-square, or F statistic for any tail.
Statistics
T-Distribution Calculator
Student's t density, cumulative probability, and quantile for any degrees of freedom.
Statistics
F-Distribution Calculator
F density, cumulative probability, and quantile for numerator/denominator degrees of freedom.
Statistics
Chi-Square Distribution Calculator
Chi-square density, cumulative probability, and quantile for any degrees of freedom.
Statistics
T-Test Calculator
One-sample, two-sample (Welch or pooled), and paired t-tests with APA write-up.
Statistics
Z-Test Calculator
One- and two-sample z-tests against a known population standard deviation, with APA write-up.
Statistics
ANOVA Calculator
One-way ANOVA across any number of groups with F, p, and eta-squared.
Statistics
F-Test Calculator
F-test for equality of two variances with p-value and APA write-up.
Statistics
Chi-Square Goodness-of-Fit Test
Chi-square goodness-of-fit test comparing observed counts to an expected distribution.
Statistics
Chi-Square Test of Independence
Chi-square test of independence on a contingency table with Cramer's V.