Tools – Stat Tools

Assumptions shapiro-wilk normality w statistic p-value

Categorical data chi-square independence contingency table expected counts

Categorical data fisher exact 2x2 odds ratio exact p-value

Core confidence interval margin of error z t

Core effect size cohen d hedges g

Core p-value alpha significance hypothesis test

Correlation correlation significance r p-value t-stat

Correlation pearson correlation covariance r

Correlation spearman rank correlation rho monotonic

Data cleaning outlier iqr z-score quartiles

Guides which test test selector t-test vs anova chi-square

Mean comparison paired t-test before after differences t statistic

Nonparametric mann-whitney u test rank sum nonparametric

Nonparametric wilcoxon signed-rank paired nonparametric signed ranks

Planning bonferroni holm multiple testing fdr

Planning sample size power alpha beta

Proportions two proportion z test pooled proportion standard error z

Regression linear regression slope intercept r squared