Table 1.

Correlation between mean and difference, assuming a correlation between the two measures of 0.7.

Variance ratio	1	1.1	1.2	1.5	1.8	2	3	4	5	10	15	20	50
Correlation	0.00	0.07	0.13	0.27	0.39	0.44	0.63	0.72	0.78	0.89	0.93	0.95	0.98