data hosp; input x1-x5 y; cards; 15.57 2463 472.92 18 4.45 566.52 44.02 2048 1339.75 9.5 6.92 696.82 20.42 3940 620.25 12.8 4.28 1033.15 18.74 6505 568.33 36.7 3.9 1603.62 49.2 5723 1497.6 35.7 5.5 1611.37 44.92 11520 1365.83 24 4.6 1613.27 55.48 5779 1687 43.3 5.62 1854.17 59.28 5969 1639.92 46.7 5.15 2160.55 94.39 8461 2872.33 78.7 6.18 2305.58 128.02 20106 3655.08 180.5 6.15 3503.93 96 13313 2912 60.9 5.88 3571.89 131.42 10771 3921 103.7 4.88 3741.4 127.21 15543 3865.67 126.8 5.5 4026.52 252.9 31694 7684.1 157.7 7 10343.81 409.2 34703 12446.33 169.4 10.78 11232.17 463.7 39204 14098.4 331.4 7.05 15414.94 510.22 86533 15524 371.6 6.35 18854.45 ; proc reg; model y = x1-x5 / vif maxr; run;