. Author manuscript; available in PMC: 2010 Oct 12.

Published in final edited form as: Stat Med. 2009 May 15;28(11):1620–1635. doi: 10.1002/sim.3563

Table DIV.

Mean Bias, MSE, Correlation and SEE for predicted values with unequal sample sizes.

Method	Mean bias	MSE	Correlation	SEE
Total sample size N = (100+200+500 +1200+3000) × 3 = 15 000
Weighted mean	0.0201	0.0994	0.9886	1.1105
Mean	−0.0219	0.1134	0.9825	1.2773
Total sample size N = (10+20+50+120+300) × 3 = 1500
Weighted mean	−0.01580	0.3394	0.9900	4.1135
Mean	0.1993	0.3550.	0.9789	4.3768