The operations manager at a factory is interested in the lifespan of an electronic component used in one of the factory's machines. The producer of the electronic component claims that it has an average life of 6,200 hours. A random sample of 40 components is studied, and their lifespans are recorded. You have already examined this data set, in Chapter 6 Review Exercise 9. Is there evidence that the average lifespan of the electronic components is less than the manufacturer claims? Complete a formal hypothesis test, using α = 0.05.

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