when designing a research proposal when is an analysis of va

when designing a research proposal, when is an analysis of variance (ANOVA) the best choice for providing the most robust results?

a) when investigating whether distributons of categorical variables differ from one another

b) when investigating if the hypothesis of at least three group means are equal

c) when investigating whether a treatment group mean is equal to a control group mean

d) when investigating the probability of a relationship that may exist between variables

ANOVA is best choice when we want to compare the mean of more than 2 groups. So option (b)

\"when investigating if the hypothesis of at least three group means are equal\" is correct.