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A large company states at recruitment fairs the average employee has been with the company for...

A large company states at recruitment fairs the average employee has been with the company for 15 years. The HR department wants to test the claim. They take a random sample of 70 employees and it turns out the average tenure is 14.6 years with a standard deviation of 3.1 years. At α = 0.01 can the company continue to make its claim?

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