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The Internal Tax Revenue Service reports that the mean federal income tax pais in the yesr 2010 was $8040. Assume that the Standard Deviation is

The Internal Tax Revenue Service reports that the mean federal income tax pais in the yesr 2010 was $8040. Assume that the Standard Deviation is $5,000. The IRS plans to draw a sample of 1,000 tax returns to study the effect of a new tax law. What is the probability that the sample mean tax is less than $8,100?

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