TABLE 4.

Effects of difference in radon exposure for smokers and non-smokers, with x = smoker/non-smoker exposures in each county. Table gives value of B for various choices of the width of distribution of x-values (SD as fraction of mean) and Corr(x,r).

x-average	SD of x	Corr(x,r)	B
0.8	0.57	1.0	−4.9
0.9	0.57	1.0	−4.8
1.0	0.57	1.0	−4.7
1.2	0.57	1.0	−4.5
1.5	0.57	1.0	−4.3
0.9	0.57	0	−6.5
0.9	0.57	0.4	−5.9
0.9	0.57	0.7	−5.5
0.9	0.57	1.0	−4.8
0.9	0.28	0	−7.3
0.9	0.28	0.4	−6.7
0.9	0.28	1.0	−5.6