Q4 Identify the statement below that best describes the relationship between an Outcome variable and an Explanatory variable when the Explanatory variable prodcues noticeable amounts of between group variation.

a) The extra effort involved in generating a model will not result in much predictive improvement. b) The extra effort involved in generating a model should result in significant predictive improvement. c) The amount of within-group variation should also be large. d) The relationship between the two variables will be weak.