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14 p, 370.8 KB Heteroscedasticity irrelevance when testing means difference / Flores M., Pablo (Escuela Superior Politécnica de Chimborazo (Equador). Grupo de Investigación en Ciencia de Datos CIDED) ; Ocaña, Jordi (Universitat de Barcelona)
Heteroscedasticity produces a lack of type I error control in Student’s t test for difference between means. Pretesting for it (e. g. , by means of Levene’s test) should be avoided as this also induces type I error. [...]
2018 - 10.2436/20.8080.02.69
SORT : statistics and operations research transactions, Vol. 42 Núm. 1 (January-June 2018) , p. 59-72 (Articles)  

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