Question: For the lung function data described in Appendix A, find the regression of FEV1 on weight and height for the fathers. Divide each of the

For the lung function data described in Appendix A, find the regression of FEV1 on weight and height for the fathers. Divide each of the two explanatory variables into two intervals:

greater than, and less than or equal to the respective median. Is there an interaction between the two explanatory variables?

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