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(d) Would it be unusual if the sample mean were less than $7700? (e) Do you think it would be unusual for an individual to pay a tax of less than $7700? Explain.

(d) Would it be unusual if the sample mean were less than $7700? (e) Do you think it would be unusual for an individual to pay a tax of less than $7700? Explain.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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5)The Internal Revenue Service reports that the mean federal income tax paid in the year was $8040. Assume that the standard deviation is $4800. 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 $8200 ? (b) What is the probability that the sample mean tax is between $7400 and $7900 ? (c) Find the 20 th percentile of the sample mean.
Transcribed Image Text:5)The Internal Revenue Service reports that the mean federal income tax paid in the year was $8040. Assume that the standard deviation is $4800. 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 $8200 ? (b) What is the probability that the sample mean tax is between $7400 and $7900 ? (c) Find the 20 th percentile of the sample mean.
(d) Would it be unusual if the sample mean were less than $7700? (e) Do you think it would be unusual for an individual to pay a tax of less than $7700? Explain. 8
Transcribed Image Text:(d) Would it be unusual if the sample mean were less than $7700? (e) Do you think it would be unusual for an individual to pay a tax of less than $7700? Explain. 8
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