Normal DistributionsQuality control A manufacturer of
Chapter 8, Problem 49E(choose chapter or problem)
Problem 49E
Normal Distributions
Quality control A manufacturer of generator shafts finds that it needs to add additional weight to its shafts in order to achieve proper static and dynamic balance. Based on experimental tests, the average weight it needs to add is µ = 35 gm with σ = 9 gm. Assuming a normal distribution, from 1000 randomly selected shafts, how many would be expected to need an added weight in excess of 40 gm?
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