Question

The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $5000. The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law.

A) What is the probability that the sample mean tax is less than $7900? Round the answer to at least four decimal places.

B) What is the probability that the sample mean tax is between $7600 and $8100? Round the answer to at least four decimal places.

C) Find the 40th percentile of the sample mean. Round the answer to
at least one decimal place.

D) Would it be unusual if the sample mean were less than $7900?

E) What is the probability of the sample mean being less than $7900 Round the answer to at least four decimal places.

Answer #1

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 to study the effect of a new tax law.
What is the probability that the sample mead tax is less than
7800? Round 4 decimals
What is the probability that that sample mean tax is between
7500 and 8000? Round atleast 4 places
Find the 30th...

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b. What is the probability that the sample mean tax return is
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Suppose the CPA Practice Advisor reports that the mean
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According to the Internal Revenue Service, the mean tax refund
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(Round the intermediate values to 2 decimal places. Round
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The CPA Practice Advisory reports that the mean preparation fee
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Among all the state income tax forms filed in a particular
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Dottie's Tax Service specializes in federal tax returns for
professional clients, such as physicians, dentists, accountants,
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last year. Assuming this rate continues into this year and she
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on:
More than 8 returns? (Round your
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