Returning to question 21, say (1), your company’s policy is to accept the shipment only when fewer than two springs (out of 400 springs examined) are bad, and (2) the proportion of the bad springs in the truck is only 0.0001. Under these conditions, what is the probability that you will accept the shipment?

Question 21

Every week a truckload of springs is delivered to the warehouse you supervise. Every time the springs arrive, you have to measure the strength of 400 springs. You accept the shipment only when there are fewer than 20 bad springs. One day a truckload of springs arrives that contains 10 % bad springs. What is the probability that you will accept the shipment?