dataset=pollution begin description This is the pollution data so loved by writers of papers on ridge regression. Source: McDonald, G.C. and Schwing, R.C. (1973) 'Instabilities of regression estimates relating air pollution to mortality', Technometrics, vol.15, 463- 482. Obtained from STATLIB, entered for Arc by Hassan Abuhassan Variables in order: PREC Average annual precipitation in inches JANT Average January temperature in degrees F JULT Same for July OVR65 % of 1960 SMSA population aged 65 or older POPN Average household size EDUC Median school years completed by those over 22 HOUS % of housing units which are sound & with all facilities DENS Population per sq. mile in urbanized areas, 1960 NONW % non-white population in urbanized areas, 1960 WWDRK % employed in white collar occupations POOR % of families with income < $3000 HC Relative hydrocarbon pollution potential NOX Same for nitric oxides SO Same for sulphur dioxide HUMID Annual average % relative humidity at 1pm MORT Total age-adjusted mortality rate per 100,000 end description begin variables col 0 = PREC col 1 = JANT col 2 = JULT col 3 = OVR65 col 4 = POPN col 5 = EDUC col 6 = HOUS col 7 = DENS col 8 = NONW col 9 = WWDRK col 10 = POOR col 11 = HC col 12 = NOX col 13 = SO col 14 = HUMID col 15 = MORT end variables begin data 36 27 71 8.1 3.34 11.4 81.5 3243 8.8 42.6 11.7 21 15 59 59 921.87 35 23 72 11.1 3.14 11 78.8 4281 3.5 50.7 14.4 8 10 39 57 997.875 44 29 74 10.4 3.21 9.8 81.6 4260 0.8 39.4 12.4 6 6 33 54 962.354 47 45 79 6.5 3.41 11.1 77.5 3125 27.1 50.2 20.6 18 8 24 56 982.291 43 35 77 7.6 3.44 9.6 84.6 6441 24.4 43.7 14.3 43 38 206 55 1071.289 53 45 80 7.7 3.45 10.2 66.8 3325 38.5 43.1 25.5 30 32 72 54 1030.38 43 30 74 10.9 3.23 12.1 83.9 4679 3.5 49.2 11.3 21 32 62 56 934.7 45 30 73 9.3 3.29 10.6 86 2140 5.3 40.4 10.5 6 4 4 56 899.529 36 24 70 9 3.31 10.5 83.2 6582 8.1 42.5 12.6 18 12 37 61 1001.902 36 27 72 9.5 3.36 10.7 79.3 4213 6.7 41 13.2 12 7 20 59 912.347 52 42 79 7.7 3.39 9.6 69.2 2302 22.2 41.3 24.2 18 8 27 56 1017.613 33 26 76 8.6 3.2 10.9 83.4 6122 16.3 44.9 10.7 88 63 278 58 1024.885 40 34 77 9.2 3.21 10.2 77 4101 13 45.7 15.1 26 26 146 57 970.467 35 28 71 8.8 3.29 11.1 86.3 3042 14.7 44.6 11.4 31 21 64 60 985.95 37 31 75 8 3.26 11.9 78.4 4259 13.1 49.6 13.9 23 9 15 58 958.839 35 46 85 7.1 3.22 11.8 79.9 1441 14.8 51.2 16.1 1 1 1 54 860.101 36 30 75 7.5 3.35 11.4 81.9 4029 12.4 44 12 6 4 16 58 936.234 15 30 73 8.2 3.15 12.2 84.2 4824 4.7 53.1 12.7 17 8 28 38 871.766 31 27 74 7.2 3.44 10.8 87 4834 15.8 43.5 13.6 52 35 124 59 959.221 30 24 72 6.5 3.53 10.8 79.5 3694 13.1 33.8 12.4 11 4 11 61 941.181 31 45 85 7.3 3.22 11.4 80.7 1844 11.5 48.1 18.5 1 1 1 53 891.708 31 24 72 9 3.37 10.9 82.8 3226 5.1 45.2 12.3 5 3 10 61 871.338 42 40 77 6.1 3.45 10.4 71.8 2269 22.7 41.4 19.5 8 3 5 53 971.122 43 27 72 9 3.25 11.5 87.1 2909 7.2 51.6 9.5 7 3 10 56 887.466 46 55 84 5.6 3.35 11.4 79.7 2647 21 46.9 17.9 6 5 1 59 952.529 39 29 75 8.7 3.23 11.4 78.6 4412 15.6 46.6 13.2 13 7 33 60 968.665 35 31 81 9.2 3.1 12 78.3 3262 12.6 48.6 13.9 7 4 4 55 919.729 43 32 74 10.1 3.38 9.5 79.2 3214 2.9 43.7 12 11 7 32 54 844.053 11 53 68 9.2 2.99 12.1 90.6 4700 7.8 48.9 12.3 648 319 130 47 861.833 30 35 71 8.3 3.37 9.9 77.4 4474 13.1 42.6 17.7 38 37 193 57 989.265 50 42 82 7.3 3.49 10.4 72.5 3497 36.7 43.3 26.4 15 18 34 59 1006.49 60 67 82 10 2.98 11.5 88.6 4657 13.5 47.3 22.4 3 1 1 60 861.439 30 20 69 8.8 3.26 11.1 85.4 2934 5.8 44 9.4 33 23 125 64 929.15 25 12 73 9.2 3.28 12.1 83.1 2095 2 51.9 9.8 20 11 26 58 857.622 45 40 80 8.3 3.32 10.1 70.3 2682 21 46.1 24.1 17 14 78 56 961.009 46 30 72 10.2 3.16 11.3 83.2 3327 8.8 45.3 12.2 4 3 8 58 923.234 54 54 81 7.4 3.36 9.7 72.8 3172 31.4 45.5 24.2 20 17 1 62 1113.156 42 33 77 9.7 3.03 10.7 83.5 7462 11.3 48.7 12.4 41 26 108 58 994.648 42 32 76 9.1 3.32 10.5 87.5 6092 17.5 45.3 13.2 29 32 161 54 1015.023 36 29 72 9.5 3.32 10.6 77.6 3437 8.1 45.5 13.8 45 59 263 56 991.29 37 38 67 11.3 2.99 12 81.5 3387 3.6 50.3 13.5 56 21 44 73 893.991 42 29 72 10.7 3.19 10.1 79.5 3508 2.2 38.8 15.7 6 4 18 56 938.5 41 33 77 11.2 3.08 9.6 79.9 4843 2.7 38.6 14.1 11 11 89 54 946.185 44 39 78 8.2 3.32 11 79.9 3768 28.6 49.5 17.5 12 9 48 53 1025.502 32 25 72 10.9 3.21 11.1 82.5 4355 5 46.4 10.8 7 4 18 60 874.281 34 32 79 9.3 3.23 9.7 76.8 5160 17.2 45.1 15.3 31 15 68 57 953.56 10 55 70 7.3 3.11 12.1 88.9 3033 5.9 51 14 144 66 20 61 839.709 18 48 63 9.2 2.92 12.2 87.7 4253 13.7 51.2 12 311 171 86 71 911.701 13 49 68 7 3.36 12.2 90.7 2702 3 51.9 9.7 105 32 3 71 790.733 35 40 64 9.6 3.02 12.2 82.5 3626 5.7 54.3 10.1 20 7 20 72 899.264 45 28 74 10.6 3.21 11.1 82.6 1883 3.4 41.9 12.3 5 4 20 56 904.155 38 24 72 9.8 3.34 11.4 78 4923 3.8 50.5 11.1 8 5 25 61 950.672 31 26 73 9.3 3.22 10.7 81.3 3249 9.5 43.9 13.6 11 7 25 59 972.464 40 23 71 11.3 3.28 10.3 73.8 1671 2.5 47.4 13.5 5 2 11 60 912.202 41 37 78 6.2 3.25 12.3 89.5 5308 25.9 59.7 10.3 65 28 102 52 967.803 28 32 81 7 3.27 12.1 81 3665 7.5 51.6 13.2 4 2 1 54 823.764 45 33 76 7.7 3.39 11.3 82.2 3152 12.1 47.3 10.9 14 11 42 56 1003.502 45 24 70 11.8 3.25 11.1 79.8 3678 1 44.8 14 7 3 8 56 895.696 42 33 76 9.7 3.22 9 76.2 9699 4.8 42.2 14.5 8 8 49 54 911.817 38 28 72 8.9 3.48 10.7 79.8 3451 11.7 37.5 13 14 13 39 58 954.442