using the lengths (in.), chest sizes (in.), and weights (lb) of bears from a data set, the resulting regression equation is weight 2740.426 length 12.1 chest size. the p-value is 0.000 and the adjusted r value is 0.925. if an additional predictor variable of neck size (in.) is included, the p-value becomes 0.000 and the adjusted r becomes 0.933. why is it better to use values of adjusted r instead of simply using values of r?
