Method library
The method library of classical statistics.
Relationship, difference, estimation and reliability — the 54 classical methods Clarus supports, across 5 families. Each derives from its own source; start an analysis to run one.
Relationships & regression · 15
Methods that examine the relationship and prediction between variables — correlation and regression.
- Absolute risk difference / NNT, 2x2
- Binary logistic regression
- Kendall's tau rank correlation
- Multinomial logistic regression (baseline-category logit model)
- Multiple linear regression (ordinary least squares)
- Odds ratio, 2x2 (case-control)
- Ordinal logistic regression (proportional-odds model)
- Partial correlation
- Pearson product-moment correlation
- Phi coefficient (2x2 association)
- Point-biserial correlation
- Poisson regression
- Relative risk (risk ratio), cohort 2x2
- Simple linear regression (OLS)
- Spearman rank-order correlation
Group comparisons · 26
Tests that compare differences between groups — t-tests, ANOVA, Mann-Whitney and the like.
- Chi-square goodness-of-fit test
- Chi-square test of independence
- Cochran's Q test
- Exact binomial test (one-sample proportion)
- Fisher's exact test (2x2)
- Friedman test
- Independent-samples t-test
- Kruskal-Wallis H test
- Mann-Whitney U test
- McNemar test (paired binary)
- Mixed (split-plot) ANOVA
- Mood's median test (k groups)
- One-proportion z-test
- One-sample Wilcoxon signed-rank test
- One-sample t-test
- One-sample z-test (known sigma)
- One-way ANOVA
- One-way analysis of covariance (ANCOVA)
- Paired-samples t-test
- Repeated-measures ANOVA (one-way, within-subjects)
- Sign test (paired)
- Two-proportion z-test
- Two-way (factorial) ANOVA
- Welch t-test (unequal variances)
- Welch's ANOVA (one-way, heteroscedastic)
- Wilcoxon signed-rank test
Estimation (confidence intervals) · 2
Methods that estimate quantities such as proportions and means, with confidence intervals.
Descriptive statistics · 3
Measures that summarise and describe the data.
Reliability & agreement · 8
Methods that assess measurement reliability and consistency.
- Bland-Altman method-agreement analysis
- Cohen's kappa (two-rater categorical agreement)
- Cronbach's alpha (internal-consistency reliability)
- Fleiss' kappa (k raters)
- Intraclass correlation coefficient (ICC)
- McDonald's omega (omega total)
- Split-half reliability (Spearman-Brown corrected)
- Test-retest reliability (temporal stability)