差分

!style="width:200px"|Independent samples<br>(Unpaired in case of two)

!style="width:200px"|Dependent samples<br>(Paired in case of two)

!rowspan="2" style="width:80px"|Means

!style="width:40px"|2

*'''Fisher-Behrens'''

*'''Welch'''

*'''Paired Student's t test'''

::<math>

</math>

::where <math>\bar{d}</math> is the mean of differences of paired observations

*'''Wilcoxon rank sum test'''

**AKA '''Mann-Whitney test'''

*'''Wilcoxon signed rank test'''

**here 'signed' means 'take into account signs of differences of paired data'

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!3 or more

*'''ANOVA'''

*'''Linear-regression model'''

*Repeated measures ANOVA

*'''Kruskall-Wallis test'''

<nowiki>*</nowiki>needs try to transform data into parametric (e.g., logarithmic), or other considerations

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