Mathematics
Mathematics, 07.04.2020 20:21, 10040816

The Federal Reserve System publishes data on family income based on its Survey of Consumer Finances. When the head of the household has a college degree, the mean before-tax family income is $ 84,950. Suppose that 70% of the before-tax family incomes when the head of the household has a college degree are between $74,800 and $95,100 and that these incomes are normally distributed. What is the standard deviation of before-tax family incomes when the head of the household has a college degree?

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The Federal Reserve System publishes data on family income based on its Survey of Consumer Finances....

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