Chapter 10 - Correlation and Regression - Review Exercises - Section 10-3 - Page 604: 8

5.45

From Exercise 4, we have the regression equation $y' = -0.1701x + 5.816$ with $\hat x=28, \hat y=1.05$ Also $n=7, \bar x=22.4, \sum x=157, \sum (y-y')^2=10.05, \sum x^2=3727$ $\alpha/2=0.005, df=5, t_{\alpha/2}=3.365$ $S_e=1.42, E=3.365\times 1.42\times1.14=5.45$