data list list /Y X1 X2 X3 X4. begin data. 78.5 7 26 6 60 74.3 1 29 15 52 104.3 11 56 8 20 87.6 11 31 8 47 95.9 7 52 6 33 109.2 11 55 9 22 102.7 3 71 17 6 72.5 1 31 22 44 93.1 2 54 18 22 115.9 21 47 4 26 83.8 1 40 23 34 113.3 11 66 9 12 109.4 10 68 8 12 end data.