11-4. An article in Technometrics by S. C. Narula and J. F. Wellington ["Prediction, Linear Regression, and a Minimum Sum of Relative Errors" (Vol. 19, 1977)] presents data on the selling price and annual taxes for 24 houses. The data are shown in the following table. Taxes Taxes Sale (Local, School), Sale (Local, School), Price/1000 County)/1000 Price/1000 County)/1000 25.9 4.9176 30.0 5.0500 29.5 5.0208 36.9 8.2464 27.9 4.5429 41.9 6.6969 25.9 4.5573 40.5 7.7841 29.9 5.0597 43.9 9.0384 29.9 3.8910 37.5 5.9894 30.9 5.8980 37.9 7.5422 28.9 5.6039 44.5 8.7951 35.9 5.8282 37.9 6.0831 31.5 5.3003 38.9 8.3607 31.0 6.2712 36.9 8.1400 30.9 5.9592 45.8 9.1416