The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $4900. The IRS plans to draw a sample of 1000 tax returns study the effect of a new tax law.

The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $4900. The IRS plans to draw a sample of 1000 tax returns study the effect of a new tax law.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Taxes: The Internal Revenue Service reports that the mean federal
income tax paid in the year 2010 was $8040. Assume that the standard
deviation is $4900. The IRS plans to draw a sample of 1000 tax returns
study the effect of a new tax law.
The probability that the sample mean tax is less than $7800 is
AA C
(a) What is the probability that the sample mean tax is less than $
? Round the answer to at least four decimal places.
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