ASQ
CQE · Question #79
You have been asked to sample a lot of 500 units from vendor whose past quality has been about 2% defective. A sample of 40 pieces is drawn from the lot and you have been told to reject the lot if…
The correct answer is C. 0.191. See the full explanation below for the reasoning.
Product and Process Control
Question
You have been asked to sample a lot of 500 units from vendor whose past quality has been about 2% defective. A sample of 40 pieces is drawn from the lot and you have been told to reject the lot if you find two or more parts defective. What is the probability of finding two or more parts defective?
Options
- A0.953
- B0.809
- C0.191
- D0.047
How the community answered
(37 responses)- A5% (2)
- B3% (1)
- C78% (29)
- D14% (5)
Topics
#acceptance sampling#Poisson approximation#binomial probability#lot rejection
Community Discussion
No community discussion yet for this question.