Under What Conditions Are the Inferential Statistics Used Typically Robust

Multiple Choice

Under what conditions are the inferential statistics used typically robust against violations of assumptions?

A) only if the independent variable is not clearly nominal or ordinal
B) only if the participants were not randomly selected but we are cautious when generalizing
C) only if the population is not normally distributed but there are at least 30 data points in the sample
D) only if the independent variable is not clearly nominal or ordinal, participants were not randomly selected but we are cautious when generalizing, and the population is not normally distributed but there are at least 30 data points in the sample