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CRE · Question #300
CRE Question #300: Real Exam Question with Answer & Explanation
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Question
In a life test of 4 batteries, failures were observed after 10, 30, and 40 hours. The 4th battery was tested 75 hours without failure, at which time the test was terminated. What are the estimated Mean-Time-To-Failure (theta) and failure rate (lambda)?
Options
- AEstimated MTTF = .019; Failure rate = 52
- BEstimated MTTF = 27; Failure rate = .038
- CEstimated MTTF = 52; Failure rate = .019
- DEstimated MTTF = 14; Failure rate = .017
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