In statsExpressions: Tidy Dataframes and Expressions with Statistical Details

between-subjects

Hypothesis testing

| Type | No. of groups | Test | Function used | | :------------- | :------------ | :---------------------------- | :----------------------- | | Parametric | 2 | Student's or Welch's t-test | stats::t.test() | | Non-parametric | 2 | Mann-Whitney U test | stats::wilcox.test() | | Robust | 2 | Yuen's test for trimmed means | WRS2::yuen() | | Bayesian | 2 | Student's t-test | BayesFactor::ttestBF() |

Effect size estimation

| Type | No. of groups | Effect size | CI available? | Function used | | :------------- | :------------ | :------------------------------------------------------ | :------------ | :------------------------------------------------- | | Parametric | 2 | Cohen's d, Hedge's g | Yes | effectsize::cohens_d(), effectsize::hedges_g() | | Non-parametric | 2 | r (rank-biserial correlation) | Yes | effectsize::rank_biserial() | | Robust | 2 | Algina-Keselman-Penfield robust standardized difference | Yes | WRS2::akp.effect() | | Bayesian | 2 | difference | Yes | bayestestR::describe_posterior() |

within-subjects

Hypothesis testing

| Type | No. of groups | Test | Function used | | :------------- | :------------ | :------------------------------------------------- | :----------------------- | | Parametric | 2 | Student's t-test | stats::t.test() | | Non-parametric | 2 | Wilcoxon signed-rank test | stats::wilcox.test() | | Robust | 2 | Yuen's test on trimmed means for dependent samples | WRS2::yuend() | | Bayesian | 2 | Student's t-test | BayesFactor::ttestBF() |

Effect size estimation

| Type | No. of groups | Effect size | CI available? | Function used | | :------------- | :------------ | :------------------------------------------------------ | :------------ | :------------------------------------------------- | | Parametric | 2 | Cohen's d, Hedge's g | Yes | effectsize::cohens_d(), effectsize::hedges_g() | | Non-parametric | 2 | r (rank-biserial correlation) | Yes | effectsize::rank_biserial() | | Robust | 2 | Algina-Keselman-Penfield robust standardized difference | Yes | WRS2::wmcpAKP() | | Bayesian | 2 | difference | Yes | bayestestR::describe_posterior() |

statsExpressions documentation built on Aug. 8, 2025, 7:55 p.m.