Predicting IQ Score Refer to Data Set 9 “IQ and Brain Size” in Appendix B and find the best regression equation with IQ score as the response (y) variable. Use predictor variables of brain volume and>or body weight. Why is this equation best? Based on these results, can we predict someone’s IQ score if we know their brain volume and body weight? Based on these results, does it appear that people with larger brains have higher IQ scores? Appendix B Data Sets. In Exercises 13–16, refer to the indicated data set in Appendix B and use technology to obtain results.