Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card)
6th Edition
ISBN: 9780357228708
Author: David R. Anderson; Dennis J. Sweeney; Thomas A. Williams
Publisher: Cengage Learning US
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Chapter 9.3, Problem 19E
The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they prepare their tax returns. In recent years, the IRS has been inundated with taxpayer calls and has redesigned its phone service as well as posting answers to frequently asked questions on its website (The Cincinnati Enquirer, January 7, 2010). According to a report by a taxpayer advocate, callers using the new system can expect to wait on hold for an unreasonably long time of 12 minutes before being able to talk to an IRS employee. Suppose you select a sample of 50 callers after the new phone service has been implemented; the sample results show a mean waiting time of 10 minutes before an IRS employee comes on line. Based upon data from past years, you decide it is reasonable to assume that the standard deviation of waiting times is 8 minutes. Using your sample results, can you conclude that the actual mean waiting time turned out to be significantly less than the 12-minute claim made by the taxpayer advocate? Use α = .05.
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On December 17, 2010, the Wilmington, North Carolina StarNews carried an Associated Press report headlined "13 million get unexpected tax bill from Obama tax credit". The report said that
The Internal Revenue Service reported that the average tax refund was $2,892 in the 2010 filing season, up from $2,663 in 2009. However, the number of refunds dropped by 3.5 percent to 93.3 million.
What was the percentage increase in the average tax refund from 2009 to 2010?
$2,892 - $2,663= 229 ÷ $2,663= 0.08599324% was the percentage increase from 2009 to 2010.
How many refunds were there in 2009 and in 2010? (Use the information given in the problem to find your answer.)
c. The number of refunds decreased while the average refund increased, so you need some arithmetic to decide how the total dollar amount refunded changed from 2009 to 2010. Find that change in both absolute and percentage terms
Juanita was involved in an auto accident in which she was at fault. Her own car sustained $1,249 damages and the other vehicle cost $1,500 to repair.
Juanita was not injured, but the driver of the other car required medical treatment costing $17,606 and a passenger's injuries totaled $11,995. Juanita's policy includes 10/20/5 liability, $500 deductible collision and $100 deductible comprehensive. How much of the damages must Juanita pay (in $)?
on december 17, 2010 the wilmington, north caroline StarNews carried on associated press report headlined "13 million get unexpected tax bill from Obama tax credit". The report said that the international revenue service reported that the average tax refund was $2,892 in the 2010 filing season, up from $2,663 in 2009. however, the number of refunds dropped by 3.5%, to 93.3 million.
how many refunds were there in 2009 and in 2010?
Chapter 9 Solutions
Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card)
Ch. 9.1 - 1. The manager of the Danvers-Hilton Resort Hotel...Ch. 9.1 - 2. The manager of an automobile dealership is...Ch. 9.1 - 3. A production line operation is designed to fill...Ch. 9.1 - 4. Because of high production-changeover time and...Ch. 9.2 - 5. Duke Energy reported that the cost of...Ch. 9.2 - Prob. 6ECh. 9.2 - Carpet Salesperson Salaries. Carpetland...Ch. 9.2 - 8. Suppose a new production method will be...Ch. 9.3 - Consider the following hypothesis test:
A sample...Ch. 9.3 - Prob. 10E
Ch. 9.3 - Consider the following hypothesis test:
A sample...Ch. 9.3 - Prob. 12ECh. 9.3 - Prob. 13ECh. 9.3 - Prob. 14ECh. 9.3 - Federal Tax Returns. According to the IRS,...Ch. 9.3 - In a study entitled How Undergraduate Students Use...Ch. 9.3 - The mean hourly wage for employees in...Ch. 9.3 - Young millennials, adults aged 18 to 34, are...Ch. 9.3 - The Internal Revenue Service (IRS) provides a...Ch. 9.3 - Prescription Drug Costs. Annual expenditure for...Ch. 9.3 - Cost of Telephone Surveys. Fowle Marketing...Ch. 9.3 - Time in Supermarket Checkout Lines. CCN and...Ch. 9.4 - Consider the following hypothesis test:
A sample...Ch. 9.4 - Consider the following hypothesis test:
A sample...Ch. 9.4 - Consider the following hypothesis test:
A sample...Ch. 9.4 - Prob. 26ECh. 9.4 - Which is cheaper: eating out or dining in? The...Ch. 9.4 - CEO Tenure. A shareholders’ group, in lodging a...Ch. 9.4 - The national mean annual salary for a school...Ch. 9.4 - Time in Child Care. The time married men with...Ch. 9.4 - Chocolate Consumption. The United States ranks...Ch. 9.4 - Used Car Prices. According to the National...Ch. 9.4 - Automobile Insurance Premiums. The Onsure.com...Ch. 9.4 - Prob. 34ECh. 9.5 - Consider the following hypothesis test:
A sample...Ch. 9.5 - Prob. 36ECh. 9.5 - The U.S. Bureau of Labor Statistics reports that...Ch. 9.5 - Attitudes toward Supermarket Brands. A study by...Ch. 9.5 - Prob. 39ECh. 9.5 - Prob. 40ECh. 9.5 - Ten years ago 53% of American families owned...Ch. 9.5 - Returned Merchandise. According to the University...Ch. 9.5 - Prob. 43ECh. 9.5 - Prob. 44ECh. 9.5 - The American Association of Individual Investors...Ch. 9.6 - A large department of the Federal Government wants...Ch. 9.6 - CEOs who belong to a popular business-oriented...Ch. 9.6 - Prob. 48ECh. 9.6 - Prob. 49ECh. 9 - Production Line Fill Weights. A production line...Ch. 9 - Scholarship Examination Scores. At Western...Ch. 9 - Exposure to Background Television. CNN reports...Ch. 9 - The Wall Street Journal reported that bachelor’s...Ch. 9 - Data from the Office for National Statistics show...Ch. 9 - The mean time to earn a bachelor’s degree is 5.8...Ch. 9 - Prob. 56SECh. 9 - In Hamilton County, Ohio, the mean number of days...Ch. 9 - Fifty-two percent of Americans report that they...Ch. 9 - Prob. 59SECh. 9 - Prob. 60SECh. 9 - The unemployment rate for 18- to 34-year-olds was...Ch. 9 - Prob. 62SECh. 9 - In recent years more people have been working past...Ch. 9 - Case Problem 1 Quality Associates, Inc.
Quality...Ch. 9 - Case problem 2 Ethical Behavior of Business...
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- In 2017, Lubersec Inc. made $500,000 in sales, the sales returns and allowances were $60,000, the operating expenses were $260,000, the beginning inventory was $19,000, the net purchases were $81,000, and the ending inventory was $31,000. What was the company's 2017 gross profit? O a. $180,000 O b. $371,000 O c. $111,000 O d. $431,000 P Type here to search 24 esc 12 -arrow_forwardPolitifact reported that on September 29, 2015, Cecile Richards, then president of Planned Parenthood, was testifying before Congress. Rep. Jason Chaffetz (R, Utah) accused Ms. Richards of misusing the $500 million in annual funding that her organization receives from the federal government. Congressman Chaffetz presented the following chart from Americans for Life. He explained, “In pink, that’s the reduction in the breast exams, and the red is the increase in the abortions. That’s what’s going on in your organization?” Here is the chart: PlannedParenthood.png Does this chart present an honest representation of the data, or is it misleading? Explain your answer. If this chart misleading, are the congressman and the Americans United for Life (the creators of the chart) knaves or fools?arrow_forwardon december 17, 2010 the wilmington, north caroline StarNews carried on associated press report headlined "13 million get unexpected tax bill from Obama tax credit". The report said that the international revenue service reported that the average tax refund was $2,892 in the 2010 filing season, up from $2,663 in 2009. however, the number of refunds dropped by 3.5%, to 93.3 million. the number of refunds decreased while the average refund increased, so you need some arithmetic to decide how the total amount refunded changed from 2009 to 2010. find that change, in both absolute and percentage terms.arrow_forward
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