ASQ
CRE · Question #17
An engineer must design a product with a probability of success 99%. Assume that both the strength and stress are normally distributed and that the standard deviations are the same. If the stress is…
The correct answer is C. 3330 lbs. You've hit your session limit · resets 10:20pm (America/New_York)
Reliability in Design and Development
Question
An engineer must design a product with a probability of success 99%. Assume that both the strength and stress are normally distributed and that the standard deviations are the same. If the stress is known to be 3000 lbs with a standard deviation of 100 lbs, what must be the approximate designed strength?
Options
- A4020 lbs.
- B3730 lbs.
- C3330 lbs.
- D3100 lbs.
How the community answered
(16 responses)- B6% (1)
- C81% (13)
- D13% (2)
Explanation
You've hit your session limit · resets 10:20pm (America/New_York)
Topics
#stress-strength interference#normal distribution#design margin#probability of success
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