A least-squares multiple linear regression model was fit for 20 observations taken from mothers that were between 32 and 40 weeks pregnant. The model predicted infant birth weight (in pounds) from gestational age (weeks) and estriol level (measured just before birth from the mother's urine). The resulting regression equation is given by y = 4.18 + 0.04gestage + 0.15Testriot. The F-statistic was 20.76 with 2 and 17 degrees of freedom and p