# Credit Card Debts

1. A credit card watchdog group claims that there is a difference in the mean credit card debts of households in California and Illinois. The results of a random survey of 250 households from each state are shown at the left. The two samples are independent. Assume that s1 = \$1045 for California

and s2 = \$1350 for Illinois. Do the results support the group’s claim? Use a = 0.05.

2. A survey indicates that the mean annual wages for forensic science technicians working for local and state governments are \$55,950 and \$51,100, respectively. The survey includes a randomly selected sample of size 100 from each government branch. Assume that the population standard deviations are \$6200 (local) and \$5575 (state). The two samples are independent. At a = 0.10, is there enough evidence to conclude that there is a difference in the mean annual wages?

a. Identify the claim and state H0 and Ha.

b. Identify the level of significance a.

c. Find the critical values and identify the rejection regions.

d. Find the standardized test statistic z. Sketch a graph.

e. Decide whether to reject the null hypothesis.

f. Interpret the decision in the context of the original claim.

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.

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

### Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

## 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: