#This is the Haith-water-quality data set with 4 variables: #AC--active agriculture; #FR--forest, brushland and plantation; #UR--residential, commercial or industrial; #N--response, nitrogen concentration. #AC FR UR N 26 63 1.49 1.1 29 57 .79 1.01 54 26 2.38 1.90 2 84 3.88 1.0 3 27 32.51 1.99 19 61 3.96 1.42 16 60 6.71 2.04 40 43 1.54 1.65 28 62 1.25 1.01 26 60 1.13 1.21 26 53 1.08 1.33 15 75 .86 .75 6 84 .62 .73 3 81 1.15 .80 2 89 1.05 .76 6 82 .65 .87 22 70 1.12 .80 4 75 .58 .87 21 56 .63 .66 40 49 1.23 1.25