Prob 1.

Acceptance sampling is a statistical method used to monitor the quality of purchased parts and components. To ensure the quality of incoming parts, a purchaser or manufacturer normally samples 20 parts and allows 1 defect.

a. What is the likelihood of accepting a lot that is 1% defective?

b. If the quality of the incoming lot was actually 2%, what is the likelihood of accepting it?

c. If the quality of the incoming lot was actually 5%, what is the likelihood of accepting it?

Prob 2.

In a sample of 200 antennae there is a probability of 1.5% that an antenna is defective.

a. What is the probability that no antenna is defective.

b. What is the probability that 3 or more antennae are defective.

Prob 3.

On average four customers waiting in line.

a. What is the probability that no customer is waiting.

b. What is the probability that four customers are waiting in line.

c. What is the probability that 4 or fewer customers are waiting.

d. What is the probability that 4 or more customers are waiting.