The accompanying data on y = normalized energy (J/m2) and x = intraocular pressure (mmHg) appeared in a scatterplot in the article "Evaluating the Risk of Eye Injuries: Intraocular Pressure During High Speed Projectile Impacts" (Current Eye Research, 2012: 43-49); an estimated regression function was superimposed on the plot.

a. Here is Minitab output from fitting the simple linear regression model. Does the model appear to specify a useful relationship between the two variables?

b. The standardized residuals resulting from fitting the simple linear regression model (in the same order as the observations) are .98,21.57, 1.47, .50,2.76,2.84, 1.47,2.85,21.03,2.20, .40, and .81. Construct a plot of e* versus x and comment.

x 2761 19764 25713 3980 12782 19008 y553 14999 32813 1667 8741 16526 x 20782 19028 14397 9606 3905 25731 y26770 16526 9868 6640 1220 30730 Predictor Constant Pressure S-3679.36 Coef -5090 1.2912 90.2% SE Coef 2257 -2.26 0.048 0.1347 9.59 0.000 R-Sq R-Sq (adj )-89.2%