Statistics

RT-FIN-137 A/B Test Sample Size Calculator

Two-proportion z-test sample size with days-to-run estimate.

Finance & Money →

RT-FIN-138 A/B Test Significance Calculator

p-value + 95% CI + ship/no-ship verdict for finished A/B tests.

Finance & Money →

RT-CNV-091 Chi-Square Test Calculator

Goodness-of-fit + independence

Converters & Units →

RT-CNV-083 Confidence Interval Calculator

CI for mean + proportion

Converters & Units →

RT-CNV-099 Correlation Calculator (Pearson + Spearman)

r, p-value and 95% CI from paired data

Converters & Units →

RT-CNV-098 Effect Size Calculator (Cohen's d + Hedges' g)

Cohen's d + Hedges' g

Converters & Units →

RT-CNV-084 Linear Regression & Correlation Calculator

Slope + intercept + r + R² + scatter

Converters & Units →

RT-MAT-007 Mean Median Mode Calculator

Mean, median, mode, spread, quartiles & outliers

Mathematics →

RT-CNV-092 One-Way ANOVA Calculator

F-test + eta-squared

Converters & Units →

RT-MAT-035 Percent Error Calculator

How far a measurement is from the true value, as a percentage

Mathematics →

RT-CNV-080 Permutation & Combination Calculator

nPr, nCr, factorial (BigInt)

Converters & Units →

RT-CNV-093 Sample Size Calculator

Cochran + A/B test power

Converters & Units →

RT-CNV-081 Standard Deviation Calculator

Mean, SD, variance, quartiles

Converters & Units →

RT-CNV-097 Standard Error Calculator

SE of mean + proportion

Converters & Units →

RT-CNV-090 T-Test Calculator

One-sample / Welch / paired

Converters & Units →

RT-CNV-082 Z-Score Calculator

Standard score + percentile + p-value

Converters & Units →