Question

_____ is used to test the differences in the mean value of a dependent variable among different groups defined by two or more independent variables.

Answer 1

Sol:

ANOVA is used to test the differences in the mean value of a dependent variable among different groups defined by two or more independent variables.

if its less than 2 groups go for t test

for more than 2 groups go for ANOVA

HERE MORE THAN 2 GROUPS

First, ANOVA can be used for comparing the means of more than two groups and is in fact more statistically powerful in this situation. Moreover, variants of ANOVA can include covariates, which allow one to control statistically for confounders and to detect interactions whereby one variable moderates the effects of another variable.