From: A simple ratio-based approach for power and sample size determination for 2-group comparison using Rasch models
Variables
Linear regression model
Raschpower method
σ2
3.9323
J
8
γ
/
0.649
Ng
197
δ
(2.61, 2.94, 1.75, 0.46, −0.11, 0.36, 1.28, 2.23)
Ra
1.27210
1.34
NR
251
264