3. A production process produces electronic component parts. It is presumed that the probability of a defective part is 0.01. During a test of this presumption, 600 parts are sampled randomly and 18 defectives are observed.
(a) What is your response to the presumption that the process is 1% defective? Be sure that a computed probability accompanies your comment.
(b) Under the presumption of a 1% defective process, what is the probability that only 3 parts will be found defective?
(c) Do parts (a) and (b) again using the Poisson approximation.
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