Research Article

Estimating and Planning Accelerated Life Test Using Constant Stress for Generalized Logistic Distribution under Type-I Censoring

Table 3

The asymptotic variance-covariance matrix.

𝐶 0 𝑃 0 𝛾 0 𝜃 0 Parameter 𝐶 𝑃 𝛾 𝜃

1.01.01.250.7 𝐶 0.05771 0.00595 0.09077 −0.117570
𝑃 0.21348 0.04473 −0.05503
𝛾 0.32283 −0.26978
𝜃 0.35710

1.01.01.31.0 𝐶 0.05362 0.00473 0.09169 −0.10734
𝑃 0.22330 0.04694 −0.05256
𝛾 0.36304 −0.27708
𝜃 0.33362

1.01.01.51.0 𝐶 0.052250.00622 0.13867 −0.10922
𝑃 0.26782 0.07868 −0.06110
𝛾 0.74628 −0.44309
𝜃 0.36300

1.01.11.41.0 𝐶 0.03979 −0.00515 0.06411 −0.06696
𝑃 0.25300 0.03287 −0.03543
𝛾 0.32636 −0.19642
𝜃 0.22237

1.251.11.251.0 𝐶 0.10822 −0.00295 0.12193 −0.18224
𝑃 0.17555 0.18702 −0.03295
𝛾 0.28023 −0.27304
𝜃 0.42254

1.41.01.00.7 𝐶 0.09833 −0.03150 0.04490 −0.07491
𝑃 0.15330 −0.00493 0.00718
𝛾 0.09398 −0.05331
𝜃 0.09605

1.41.21.00.9 𝐶 0.25885 −0.03597 0.13991−0.35472
𝑃 0.14056 −0.00693 0.01586
𝛾 0.11485 −0.14831
𝜃 0.37572