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CRE · Question #103
CRE Question #103: Real Exam Question with Answer & Explanation
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Question
Fifteen(15) motors were tested for a total of 1,200 cumulative hours, with four failure occuring. The test was then failure-truncated. If the failure rate is assumed to be constant, what is the 95% lower confidence limit of MTBF?
Options
- A131 hours.
- B155 hours.
- C609 hours
- D876 hours.
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