Table 3

Empirical power based on 2000 runs for testing θ1 = θ2 using the LRT and Wald test for n = 30 subjects.
n = 30
 (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
 0.92
 0.93
 0.94
 0.30
 0.33
 0.32
 0.55
 0.50
 0.51
     LRT
 0.94
 0.95
 0.96
 0.35
 0.33
 0.34
 0.60
 0.56
 0.54
m = 3








     Wald
 0.99
 1.00
 1.00
 0.55
 0.56
 0.54
 0.79
 0.80
 0.79
     LRT
 1.00
 1.00
 1.00
 0.57
 0.56
 0.55
 0.82
 0.83
 0.83
m = 5








     Wald
 1.00
 1.00
 1.00
 0.80
 0.82
 0.84
 0.96
 0.95
 0.97
     LRT
 1.00
 1.00
 1.00
 0.81
 0.82
 0.85
 0.97
 0.97
 0.98

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