Sample: 300 young men (sex=1), 300 young women (sex=2) cigs = # of cigarettes smoked per day sex cigs 1 0 1 0 1 0 1 0 1 0 1 7 1 25 1 20 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 25 1 0 1 25 1 0 1 0 1 0 1 25 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 25 1 0 1 0 1 0 1 6 1 0 1 25 1 0 1 20 1 0 1 0 1 15 1 0 1 0 1 22 1 0 1 0 1 0 1 0 1 0 1 25 1 0 1 15 1 5 1 25 1 22 1 28 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 23 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 25 1 0 1 3 1 30 1 50 1 0 1 0 1 0 1 20 1 10 1 0 1 0 1 0 1 10 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 25 1 0 1 0 1 12 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 12 1 20 1 0 1 0 1 2 1 30 1 50 1 0 1 0 1 0 1 20 1 0 1 15 1 0 1 0 1 20 1 12 1 20 1 0 1 14 1 25 1 0 1 10 1 0 1 0 1 0 1 0 1 0 1 25 1 0 1 0 1 25 1 20 1 25 1 15 1 0 1 22 1 10 1 0 1 0 1 0 1 25 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 30 1 0 1 20 1 0 1 0 1 25 1 0 1 20 1 15 1 0 1 0 1 20 1 0 1 15 1 10 1 0 1 22 1 0 1 0 1 0 1 20 1 0 1 0 1 0 1 15 1 0 1 0 1 0 1 25 1 8 1 0 1 0 1 0 1 15 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 19 1 12 1 0 1 20 1 50 1 5 1 20 1 20 1 0 1 0 1 25 1 0 1 0 1 10 1 15 1 0 1 12 1 0 1 0 1 0 1 25 1 0 1 7 1 0 1 0 1 0 1 25 1 0 1 0 1 0 1 25 1 0 1 30 1 0 1 25 1 10 1 0 1 0 1 0 1 0 1 15 1 25 1 0 1 0 1 10 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 15 1 0 1 25 1 0 1 30 1 0 1 0 1 0 1 0 1 20 1 0 1 0 1 0 1 0 1 0 1 20 1 35 1 20 1 0 1 15 1 0 1 0 1 20 1 25 1 0 1 0 1 0 1 0 1 0 1 0 1 20 1 0 1 0 1 0 1 5 1 0 1 25 1 20 1 0 1 0 1 0 1 15 1 0 1 0 2 12 2 0 2 0 2 10 2 25 2 0 2 18 2 20 2 0 2 0 2 20 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 20 2 0 2 0 2 0 2 20 2 0 2 20 2 0 2 0 2 0 2 0 2 10 2 0 2 0 2 0 2 0 2 0 2 0 2 25 2 0 2 25 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 25 2 10 2 20 2 12 2 0 2 0 2 20 2 0 2 0 2 0 2 0 2 0 2 0 2 10 2 0 2 0 2 0 2 0 2 0 2 0 2 8 2 20 2 0 2 25 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 4 2 0 2 0 2 0 2 6 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 25 2 0 2 20 2 0 2 0 2 0 2 0 2 13 2 0 2 25 2 0 2 0 2 0 2 0 2 25 2 20 2 0 2 0 2 8 2 25 2 0 2 0 2 0 2 15 2 0 2 0 2 25 2 0 2 0 2 25 2 0 2 0 2 8 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 30 2 13 2 17 2 13 2 8 2 0 2 0 2 0 2 0 2 0 2 8 2 13 2 25 2 5 2 0 2 0 2 0 2 0 2 0 2 15 2 25 2 23 2 0 2 25 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 15 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 25 2 0 2 0 2 20 2 12 2 20 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 20 2 0 2 0 2 0 2 12 2 0 2 25 2 0 2 0 2 0 2 0 2 0 2 24 2 25 2 15 2 5 2 0 2 0 2 0 2 0 2 0 2 0 2 25 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 12 2 0 2 7 2 0 2 0 2 0 2 12 2 25 2 0 2 0 2 11 2 0 2 10 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 10 2 0 2 0 2 0 2 0 2 8 2 25 2 25 2 0 2 13 2 0 2 0 2 13 2 0 2 35 2 20 2 0 2 0 2 0 2 12 2 0 2 13 2 0 2 0 2 0 2 20 2 12 2 0 2 13 2 25 2 12 2 0 2 0 2 0 2 18 2 0 2 0 2 0 2 0 2 0 2 0 2 5 2 20 2 0 2 10