Paired t-test
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗Research design and statistical diagnostics calculators
25 calculators. Search or choose one below.
Calculators
One-sample t-test
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗One-way ANOVA test
Independent normal residuals and equal variances assumed; no post-hoc comparisons.
Research design and statistical diagnostics ↗Uncorrected repeated-measures ANOVA
Uncorrected sphericity-assumed model; no missing cells or covariates.
Research design and statistical diagnostics ↗Mann-Whitney rank test
Normal approximation with tie adjustment; small samples may need exact inference.
Research design and statistical diagnostics ↗Wilcoxon signed-rank test
Zero differences dropped; asymptotic model and paired-difference symmetry assumption.
Research design and statistical diagnostics ↗Kruskal-Wallis test
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗Fisher exact test
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗McNemar paired proportion test
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗Cohen kappa agreement
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗Weighted kappa agreement
Ordered categories with quadratic disagreement weights; no confidence interval.
Research design and statistical diagnostics ↗ICC(2,1) agreement point estimate
Balanced complete ratings.
Research design and statistical diagnostics ↗Raw Cronbach alpha
Raw alpha; items must already have required reverse scoring.
Research design and statistical diagnostics ↗Cohen d and approximate Hedges g
Independent groups; no paired standardization.
Research design and statistical diagnostics ↗Odds ratio interval
Large-sample descriptive interval; positive cells required, no automatic continuity correction.
Research design and statistical diagnostics ↗Risk ratio interval
Large-sample descriptive interval; positive cells required, no automatic continuity correction.
Research design and statistical diagnostics ↗Risk difference interval
Large-sample descriptive interval; positive cells required, no automatic continuity correction.
Research design and statistical diagnostics ↗Two-proportion comparison
Independent Bernoulli trials, large-sample approximation.
Research design and statistical diagnostics ↗A/B test minimum detectable effect
Planning approximation near the baseline, equal arms, no sequential peeking adjustment.
Research design and statistical diagnostics ↗A/B test power estimate
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗Multiple testing correction
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Research design and statistical diagnostics ↗Exact bootstrap mean interval
Exact empirical bootstrap of mean for 2–6 observations; no random seed or BCa approximation.
Research design and statistical diagnostics ↗Exact mean-difference permutation test
Exchangeable independent observations; exhaustive two-sided mean-difference test.
Research design and statistical diagnostics ↗Survival Kaplan-Meier estimate
Right-censored data, independent censoring assumption, no competing risks or extrapolation.
Research design and statistical diagnostics ↗Meta-analysis effect pooling
Independent effect estimates on a common additive scale.
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