Below you are given a scatterplot that shows the relationship between Profit and Type. Would you consider adding variable Type into the model you have selected in Question 17 1500- 1000- 500 Profits (SM) 0 -500- -1000 0 Type (the green diamonds show the quantiles) Yes, because Type has a solid correlation coefficient between Profits No because I worry about multi-colinearity between type and the other variable(s) in my model No because the model is strong enough and Type may complicate the parameter estimates The correlation coefficient and the scatter plot says the relationship is negative so there is no need to add Type in to the model