A Confidence Region for Zero-Gradient Solutions for Robust Parameter Design Experiments

Table 4

The simultaneous coverage rate of the critical value for the full model nonorthogonal designs (no. of simulations = 100,000, and nominal coverage rate = 95%. 𝑘: no. of control factors, ℎ: no. of noise variables, 𝑛: sample size, and 𝑣: residual df).

Model no.	𝑘	ℎ	𝑛	𝑣	Coverage rate
4	3	2	40	24	95.2%
5	4	2	74	56	95.0%
6	4	3	72	49	95.1%