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	Test t per campioni indipendenti	t-test per campioni appaiati
Campo	Statistica	Statistica
Famiglia	Hypothesis test	Hypothesis test
Anno di origine	1908	1908
Ideatore	Student (W. S. Gosset)	Student (W. S. Gosset)
Tipo	Parametric mean comparison	Parametric mean comparison
Fonte seminale	Student (W. S. Gosset) (1908). The probable error of a mean. Biometrika, 6(1), 1–25.	Student (1908). The probable error of a mean. Biometrika, 6(1), 1–25.
Alias	two-sample t-test, unpaired t-test, Student t-test, independent groups t-test	dependent t-test, matched pairs t-test, repeated measures t-test, within-subjects t-test
Correlati	4	3
Sintesi	The independent samples t-test is a parametric hypothesis test that determines whether the means of two independent, unrelated groups differ significantly on a continuous outcome variable. Derived from Gosset's 1908 t-distribution, it is one of the most widely used inferential tests in social, behavioral, biomedical, and experimental sciences.	The paired samples t-test is a parametric hypothesis test that compares the means of two related measurements from the same subjects or matched pairs to determine whether the average difference is significantly different from zero. It leverages the dependency between observations to produce a more powerful test than its independent-samples counterpart.