ASQ
CRE · Question #300
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…
The correct answer is C. Estimated MTTF = 52; Failure rate = .019. You've hit your weekly limit · resets 5am (America/New_York)
Data Collection and Use
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
How the community answered
(20 responses)- A5% (1)
- B5% (1)
- C75% (15)
- D15% (3)
Explanation
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Topics
#MTTF estimation#failure rate#censored data#life testing
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