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Mathematical Problems in Engineering
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Mathematical Problems in Engineering
/
2020
/
Article
/
Fig 4
/
Research Article
Data Analysis of Step-Stress Accelerated Life Test with Random Group Effects under Weibull Distribution
Figure 4
Box plots of estimates for parameters
σ
u
,
β
,
β
0
, and
β
1
from MLE.
(a)
(b)
(c)
(d)