In a 2018 report, the Internal Revenue Service indicated the mean refund was $2,750 with a standard

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In a 2018 report, the Internal Revenue Service indicated the mean refund was $2,750 with a standard deviation of $850. Assume the distribution of the refunds follows the normal distribution.

a. What percent of the refunds was between $1,600 and $2,000?

b. What percent of the refunds was between $900 and $3,000?

c. Based on this information, what percent of the refunds was less than $0 (that is, the taxpayer owed the IRS)?

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Statistical Techniques In Business And Economics

ISBN: 9781260239478

18th Edition

Authors: Douglas Lind, William Marchal, Samuel Wathen

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Question Posted: Dec 07, 2020 01:47 AM

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In a 2018 report, the Internal Revenue Service indicated the mean refund was $2,750 with a standard

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a To find the percent of the refunds that were between 1600 and 2000 we first need to standardize th...View the full answer

Statistical Techniques In Business And Economics

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