"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- 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 Information about the dataset CLASSTYPE: numeric CLASSINDEX: none specific " "0" "pollution" 8.1 11.1 10.4 6.5 7.6 7.7 10.9 9.3 9 9.5 7.7 8.6 9.2 8.8 8 7.1 7.5 8.2 7.2 6.5 7.3 9 6.1 9 5.6 8.7 9.2 10.1 9.2 8.3 7.3 10 8.8 9.2 8.3 10.2 7.4 9.7 9.1 9.5 11.3 10.7 11.2 8.2 10.9 9.3 7.3 9.2 7 9.6 10.6 9.8 9.3 11.3 6.2 7 7.7 11.8 9.7 8.9 3.34 3.14 3.21 3.41 3.44 3.45 3.23 3.29 3.31 3.36 3.39 3.2 3.21 3.29 3.26 3.22 3.35 3.15 3.44 3.53 3.22 3.37 3.45 3.25 3.35 3.23 3.1 3.38 2.99 3.37 3.49 2.98 3.26 3.28 3.32 3.16 3.36 3.03 3.32 3.32 2.99 3.19 3.08 3.32 3.21 3.23 3.11 2.92 3.36 3.02 3.21 3.34 3.22 3.28 3.25 3.27 3.39 3.25 3.22 3.48 11.4 11 9.8 11.1 9.6 10.2 12.1 10.6 10.5 10.7 9.6 10.9 10.2 11.1 11.9 11.8 11.4 12.2 10.8 10.8 11.4 10.9 10.4 11.5 11.4 11.4 12 9.5 12.1 9.9 10.4 11.5 11.1 12.1 10.1 11.3 9.7 10.7 10.5 10.6 12 10.1 9.6 11 11.1 9.7 12.1 12.2 12.2 12.2 11.1 11.4 10.7 10.3 12.3 12.1 11.3 11.1 9 10.7 81.5 78.8 81.6 77.5 84.6 66.8 83.9 86 83.2 79.3 69.2 83.4 77 86.3 78.4 79.9 81.9 84.2 87 79.5 80.7 82.8 71.8 87.1 79.7 78.6 78.3 79.2 90.6 77.4 72.5 88.6 85.4 83.1 70.3 83.2 72.8 83.5 87.5 77.6 81.5 79.5 79.9 79.9 82.5 76.8 88.9 87.7 90.7 82.5 82.6 78 81.3 73.8 89.5 81 82.2 79.8 76.2 79.8 8.8 3.5 0.8 27.1 24.4 38.5 3.5 5.3 8.1 6.7 22.2 16.3 13 14.7 13.1 14.8 12.4 4.7 15.8 13.1 11.5 5.1 22.7 7.2 21 15.6 12.6 2.9 7.8 13.1 36.7 13.5 5.8 2 21 8.8 31.4 11.3 17.5 8.1 3.6 2.2 2.7 28.6 5 17.2 5.9 13.7 3 5.7 3.4 3.8 9.5 2.5 25.9 7.5 12.1 1 4.8 11.7 42.6 50.7 39.4 50.2 43.7 43.1 49.2 40.4 42.5 41 41.3 44.9 45.7 44.6 49.6 51.2 44 53.1 43.5 33.8 48.1 45.2 41.4 51.6 46.9 46.6 48.6 43.7 48.9 42.6 43.3 47.3 44 51.9 46.1 45.3 45.5 48.7 45.3 45.5 50.3 38.8 38.6 49.5 46.4 45.1 51 51.2 51.9 54.3 41.9 50.5 43.9 47.4 59.7 51.6 47.3 44.8 42.2 37.5 11.7 14.4 12.4 20.6 14.3 25.5 11.3 10.5 12.6 13.2 24.2 10.7 15.1 11.4 13.9 16.1 12 12.7 13.6 12.4 18.5 12.3 19.5 9.5 17.9 13.2 13.9 12 12.3 17.7 26.4 22.4 9.4 9.8 24.1 12.2 24.2 12.4 13.2 13.8 13.5 15.7 14.1 17.5 10.8 15.3 14 12 9.7 10.1 12.3 11.1 13.6 13.5 10.3 13.2 10.9 14 14.5 13 921.87 997.875 962.354 982.291 1071.29 1030.38 934.7 899.529 1001.9 912.347 1017.61 1024.88 970.467 985.95 958.839 860.101 936.234 871.766 959.221 941.181 891.708 871.338 971.122 887.466 952.529 968.665 919.729 844.053 861.833 989.265 1006.49 861.439 929.15 857.622 961.009 923.234 1113.16 994.648 1015.02 991.29 893.991 938.5 946.185 1025.5 874.281 953.56 839.709 911.701 790.733 899.264 904.155 950.672 972.464 912.202 967.803 823.764 1003.5 895.696 911.817 954.442 36 35 44 47 43 53 43 45 36 36 52 33 40 35 37 35 36 15 31 30 31 31 42 43 46 39 35 43 11 30 50 60 30 25 45 46 54 42 42 36 37 42 41 44 32 34 10 18 13 35 45 38 31 40 41 28 45 45 42 38 27 23 29 45 35 45 30 30 24 27 42 26 34 28 31 46 30 30 27 24 45 24 40 27 55 29 31 32 53 35 42 67 20 12 40 30 54 33 32 29 38 29 33 39 25 32 55 48 49 40 28 24 26 23 37 32 33 24 33 28 71 72 74 79 77 80 74 73 70 72 79 76 77 71 75 85 75 73 74 72 85 72 77 72 84 75 81 74 68 71 82 82 69 73 80 72 81 77 76 72 67 72 77 78 72 79 70 63 68 64 74 72 73 71 78 81 76 70 76 72 3243 4281 4260 3125 6441 3325 4679 2140 6582 4213 2302 6122 4101 3042 4259 1441 4029 4824 4834 3694 1844 3226 2269 2909 2647 4412 3262 3214 4700 4474 3497 4657 2934 2095 2682 3327 3172 7462 6092 3437 3387 3508 4843 3768 4355 5160 3033 4253 2702 3626 1883 4923 3249 1671 5308 3665 3152 3678 9699 3451 21 8 6 18 43 30 21 6 18 12 18 88 26 31 23 1 6 17 52 11 1 5 8 7 6 13 7 11 648 38 15 3 33 20 17 4 20 41 29 45 56 6 11 12 7 31 144 311 105 20 5 8 11 5 65 4 14 7 8 14 15 10 6 8 38 32 32 4 12 7 8 63 26 21 9 1 4 8 35 4 1 3 3 3 5 7 4 7 319 37 18 1 23 11 14 3 17 26 32 59 21 4 11 9 4 15 66 171 32 7 4 5 7 2 28 2 11 3 8 13 59 39 33 24 206 72 62 4 37 20 27 278 146 64 15 1 16 28 124 11 1 10 5 10 1 33 4 32 130 193 34 1 125 26 78 8 1 108 161 263 44 18 89 48 18 68 20 86 3 20 20 25 25 11 102 1 42 8 49 39 59 57 54 56 55 54 56 56 61 59 56 58 57 60 58 54 58 38 59 61 53 61 53 56 59 60 55 54 47 57 59 60 64 58 56 58 62 58 54 56 73 56 54 53 60 57 61 71 71 72 56 61 59 60 52 54 56 56 54 58 "PREC" "JANT" "JULT" "OVR65" "POPN" "EDUC" "HOUS" "DENS" "NONW" "WWDRK" "POOR" "HC" "NOX" "SO2" "HUMID" "MORT" "int0" "double1" "int2" "double3" "int4" "double5" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric" "numeric"