Table IV.

Locally D-optimal design {d₀ = 0, d₁, d₂, d₃; 1/4, 1/4, 1/4, 1/4} for the exp+log model for different nominal values. The D-efficiencies of designs ξ_u and ${\xi }_0={\xi }_D^{\ast }(\theta ){\mid }_{\theta =(0.15,89,3.2,41)}$ and the corresponding threshold τ are given at the penultimate last 3 columns. The last column shows the τ-efficiencies of the design ξ_u.

c0	c1	β0	β1	d1	d2	d3	effD(ξu)	effD(ξ0)	τ	effτ(ξu)
0.15	89	3.2	41	0.0109	0.0558	0.1051	0.65	1	0.042	0.479
0.15	70	3.2	41	0.0134	0.0579	0.1063	0.72	0.99	0.041	0.490
0.15	110	3.2	41	0.0090	0.0543	0.1043	0.57	0.99	0.042	0.468
0.15	89	2.4	41	0.0103	0.0433	0.0893	0.60	0.92	0.028	0.459
0.15	89	4.0	41	0.0112	0.0727	0.1233	0.65	0.90	0.058	0.428
0.15	89	3.2	30	0.0112	0.0734	0.1422	0.72	0.82	0.058	0.467
0.15	89	3.2	50	0.0106	0.0472	0.0870	0.59	0.90	0.034	0.509