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?

Question

Quizplus · Accepted Answer

The probability of finding two or more defective parts can be calculated using the binomial distribution. With a defect rate of 2%, the probability of finding 0 or 1 defective part in a sample of 40 is calculated, and then subtracted from 1 to find the probability of finding two or more defective parts. This results in approximately 0.191.

You Have Been Asked to Sample a Lot of 500