23. In Chapter 6, Problem 17, data were presented from a study conducted to investigate the relationship between cigarette smoking and illness. The number of cigarettes smoked daily and the number of days absent from work in the last year due to illness was determined for 12 individuals employed at the company where the researcher worked. The data are shown again here.

Subject Cigarettes Smoked Days Absent 1 2 10 2 14 3 40 53 1 60 77 2 85 3 95 10 44 11 53 12 60 2696 3 12 16 10 16