data milk; length suburb termites $ 3; input id age suburb termites dieldrin; cards; 1 33 New No 1 2 34 Old Yes 1 3 29 Old No 0 4 28 New ? 0 5 29 New Yes 1 6 27 New Yes 1 7 27 New Yes 1 8 27 New No 1 9 31 New No 0 10 27 Old No 0 11 32 Old Yes 1 12 28 Old Yes 0 13 25 New Yes 0 14 27 New Yes 1 15 26 Old No 0 16 28 Old Yes 1 17 31 New No 1 18 32 New No 0 19 32 Old Yes 1 20 33 Old Yes 1 21 21 Old Yes 1 22 32 Old Yes 0 23 36 Old ? 0 24 24 Old No 0 25 34 Old Yes 1 26 28 Old Yes 0 27 26 Old No 0 28 34 Old No 0 29 29 Old No 0 30 30 Old No 0 31 28 Old Yes 1 32 32 Old No 0 33 25 New Yes 0 34 29 Old Yes 0 35 27 Old Yes 0 36 33 Old No 0 37 37 Old Yes 0 38 28 New No 0 39 30 Old No 0 40 27 Old No 0 41 23 Old No 0 42 27 Old Yes 0 43 25 Old Yes 0 44 36 Old Yes 1 45 23 Old Yes 0 ; run;