Table 4

Empirical power based on 2000 runs for testing θ1 = θ2 using the LRT and Wald test for n = 50 subjects.
n = 50
 (ρ1, ρ2) = (0.7,0.5)
(θ1, θ2) = (0.1,0.2)
 (ρ1, ρ2) = (0.6, 0.5)
(θ1, θ2) = (0.15,0.2)
 (ρ1, ρ2) = (0.5, 0.4)
(θ1, θ2) = (0.2, 0.3)
     ρ12
 0.2
 0.3
 0.4
 0.2
 0.3
 0.4
 0.1
 0.2
 0.3
m = 2








     Wald
 0.99
 0.98
 0.99
 0.47
 0.50
 0.49
 0.75
 0.72
 0.74
     LRT
 0.99
 0.99
 0.99
 0.49
 0.52
 0.51
 0.77
 0.77
 0.78
m = 3








     Wald
 1.00
 1.00
 1.00
 0.76
 0.77
 0.78
 0.94
 0.95
 0.95
     LRT
 1.00
 1.00
 1.00
 0.79
 0.78
 0.79
 0.95
 0.95
 0.96
m = 5








     Wald
 1.00
 1.00
 1.00
 0.94
 0.93
 0.95
 1.00
 0.99
 1.00
     LRT
 1.00
 1.00
 1.00
 0.95
 0.95
 0.96
 1.00
 0.99
 1.00

Shoukri et al. BMC Medical Research Methodology 2008 8:24   doi:10.1186/1471-2288-8-24