Answer: Suppose that 10% of all steel shafts produced by a
Chapter 4, Problem 4.62(choose chapter or problem)
Suppose that 10% of all steel shafts produced by a certain process are nonconforming but can be reworked (rather than having to be scrapped). Consider a random sample of 200 shafts, and let X denote the number among these that are nonconforming and can be reworked. What is the (approximate) probability that X is a. At most 30? b. Less than 30? c. Between 15 and 25 (inclusive)?
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