Alot of n items contains k defectives, andm are selected randomly and inspected. How should the value of m be chosen so that the probability that at least one defective item turns up is .90? Apply your answer to (a) n = 1000, k = 10, and (b) n = 10,000, k = 100.

Thursday, January 5 th Kim Gilbert Kimgilb@uga.edu TA Office Hours, Boyd Room 204 • Monday 11:15 am – 5:30 pm • Friday 11:15 am – 3:30 pm Case Study: Helper vs. Hinderer • If infants have no preference, then the outcome can be mimicked by flipping a fair coin • Each coin represents one child; need to toss coin 16 times o Would expect 8 but doesn't need to be exactly 8 o Tail: helper; head: hinderer o How close to 8 does it