Mathematics, 12.08.2020 08:01, o11011195

In a report prepared by the Economic Research Department of a major bank the Department manager maintains that the average annual family income on Metropolis is $48,432. What do you conclude about the validity of the report if a random sample of 400 families shows and average income of $48,574 with a standard deviation of 2000?

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In a report prepared by the Economic Research Department of a major bank the Department manager main...