Table 2.

Summary of bias, SEE, ESE and CP for γ (t) at t = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 for n = 200 and h = 0.4 under the longitudinal model (18) with β = 0.5, ${\gamma }_1(t)=0.5\sqrt{t}$ and γ₂(t) = 0.5 sin(2t) and with the sampling times models (19)–(21)

t	${\gamma }_1(t)=0.5\sqrt{t}$				γ2(t) = 0.5 sin(2t)
	Bias	SEE	ESE	CP	Bias	SEE	ESE	CP
Under sampling times model (19)
0.5	−0.0164	0.0876	0.0862	0.940	−0.0181	0.0940	0.0909	0.929
1.0	−0.0110	0.0792	0.0766	0.946	−0.0207	0.0771	0.0772	0.927
1.5	−0.0079	0.0708	0.0707	0.941	−0.0012	0.0836	0.0780	0.930
2.0	−0.0030	0.0698	0.0674	0.944	0.0221	0.0931	0.0916	0.945
2.5	−0.0040	0.0661	0.0662	0.958	0.0284	0.1004	0.0938	0.911
3.0	−0.0038	0.0661	0.0648	0.944	0.0073	0.0792	0.0754	0.932
Under sampling times model (20)
0.5	−0.0148	0.0893	0.0869	0.949	−0.0213	0.0929	0.0892	0.930
1.0	−0.0057	0.0804	0.0776	0.932	−0.0283	0.0776	0.0758	0.921
1.5	−0.0050	0.0745	0.0724	0.933	−0.0042	0.0806	0.0774	0.942
2.0	−0.0026	0.0711	0.0689	0.936	0.0187	0.0963	0.0904	0.925
2.5	−0.0035	0.0699	0.0675	0.937	0.0230	0.0941	0.0925	0.928
3.0	−0.0046	0.0699	0.0668	0.931	0.0070	0.0808	0.0748	0.923
Under sampling times model (21)
0.5	−0.0097	0.1029	0.0947	0.927	−0.0193	0.1075	0.0961	0.921
1.0	−0.0078	0.0867	0.0808	0.920	−0.0225	0.0780	0.0749	0.927
1.5	−0.0033	0.0774	0.0754	0.936	−0.0028	0.0793	0.0739	0.933
2.0	−0.0023	0.0749	0.0706	0.924	0.0195	0.0864	0.0812	0.922
2.5	−0.0013	0.0715	0.0673	0.933	0.0318	0.0819	0.0765	0.895
3.0	−0.0001	0.0666	0.0649	0.941	0.0074	0.0606	0.0575	0.936