Chapter 3:

1. A sample of retailers reported that they had the following number of copies of statistics textbooks in inventory: 57, 81, 69, 84, 85, 79, 71, 74, 55.

a. What is the mean number of textbooks in inventory?

b. What is the median number of textbooks in inventory?

c. What is the range of the number of textbooks in inventory?

d. What is the standard deviation of the number of textbooks in inventory?

Chapter 6:

2. IRS data show that 15% of personal tax returns reporting an adjusted gross income (AGI) of more than \$2,000,000 will be subject to a computer audit. This year a CPA completed 16 returns with an AGI of more than \$2,000,000. The CPA wants to know the likelihood that the returns will be audited.

a. What probability distribution applies to this situation?

b. What is the probability exactly one of these returns is audited?

c. What is the probability at least one of these returns is audited?

3. For certain personal tax returns, the IRS will compute the amount to refund a taxpayer. Suppose the Chicago office of the IRS processes an average of three returns per hour that require a refund calculation.

a. What probability distribution applies to this situation?

b. What is the probability that the IRS processes exactly three refunds in a particular hour that requires a refund calculation?

c. What is the probability the IRS does not compute a refund on any return in an hour?

d. What is the probability the IRS processes at least one return in a particular hour that requires a refund calculation?

4. A CPA studied the number of exemptions claimed on tax returns. The data are summarized as follows:

Exemptions

Percent

1

10

2

20

3

50

4

20

a. What is the mean number of exemptions claimed?

b. What is the variance of the number of exemptions claimed?

c. What is the standard deviation of the number of exemptions claimed?

Chapter 7:

5. The IRS reports that the mean refund for a particular group of taxpayers was \$1,600. The distribution of tax refunds follows a normal distribution with a standard deviation of \$850.

a. What percentage of the refunds are between \$1,600 and \$2,000?

b. What percentage of the refunds are between \$900 and \$2,000?

c. What percentage of the refund are between \$1,800 and \$2,000?

d. Ninety-five percent of the refunds are for less than what amount?

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.