The average length of prison term in the United States for white collar crime is 34.9 months.

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The average length of prison term in the United States for white collar crime is 34.9 months. A random sample of 40 prison terms indicated a mean stay of 28.5 months with a standard deviation of 8.9 months. At α = 0.04, is there sufficient evidence to conclude that the average stay differs from 34.9 months?

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