5.6 Consider the National Football League data in Table HJ. Build a linear regression model relating the number of games won to the yards gained rushing by opponents 13. the percentage of rushing plays 1'1. and a modifica- tion of the turnover differential 15. Specifically let the turnover differential be an indieator variable whose value is determined by whether the actual turnover differential is positive. negative. or zero. What conclusionsf can you dravv about the effect of turnovers on the number of games won