Question

When purchasing bulk orders of batteries, a toy manufacturer uses this acceptance sampling plan: Randomly select and test 60 batteries and determine whether each is within specifications. The entire shipment is accepted if at most 3 batteries do not meet specifications. A shipment contains 4000 batteries, and 2% of them do not meet specifications. What is the probability that this whole shipment will be accepted? Will almost all such shipments be accepted, or will many be rejected?

The probability that this whole shipment will be accepted is ______?

The company will accept (blank%) of the shipments and will reject (blank?%) of the shipments, so (almost all accepted or many rejected)?

Answer 1

This will be a binomial distribution with parameters:

n = 60, p = 0.02

Hence,

P(Whole shipment is accepted)

= P(Atmost 3 defectives)

= binom.dist(3, 60, 0..02, True) [Excel Formula]

= 0.9678

The company will accept (96.78%) of the shipments and will reject (3.22%) of the shipments, so almost all accepted.