Research Article
Statistical Analysis of a Weibull Extension with Bathtub-Shaped Failure Rate Function
Table 6
Estimation results using data in Wu et al. [
11].
| Parameter | MLE | MOM | MMOM | IMOM | MIM |
| | 0.2893 | 0.3102 | 0.3005 | 0.2806 | 0.2741 | | 100.4048 | 189.7327 | 139.5206 | 78.9727 | 66.6931 |
| Approach | 95% confidence interval for | Length |
| Chen’s (Wu’s exact ) | (0.1986, 0.3697) | 0.1771 | Wu’s exact () | (0.2106, 0.3299) | 0.1193 | Wu’s exact () | (0.2066, 0.3261) | 0.1195 | Wu’s approximated () | (0.2122, 0.3220) | 0.1098 | MOM pivot | (0.2304, 0.3640) | 0.1336 | MIM pivot | (0.2237, 0.3260) | 0.1023 |
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