For the mother, perform a regression of FEV1 on weight. Test whether the coefficients are zero. Plot the regression line on a scatter diagram of MFEV1 versus MWE1. On this plot, identify the following...

For the mother, perform a regression of FEV1 on weight. Test whether the coefficients are zero. Plot the regression line on a scatter diagram of MFEV1 versus MWE1. On this plot, identify the following groups of points: group 1: ID = 12, 33, 45, 42, 94, 144; group 2: ID = 7, 94, 105, 107, 115, 141, 141. Remove the observations in group 1 and repeat the regression analysis. How does the line change? Repeat for group 2.