DeVry Chicago STATS 430 Week 7 Quiz

Grade Details 1. Question: what is the critical value that corresponds to a confidence level of 92% Your Answer: approximately 1.48 approximately 1.55 approximately 1.75 none of these 2. Question: Compute the margin of error for a 99% confidence interval when sigma is 4 and the sample size is 36. Your Answer: ± 1.3066… ± 1.0966… ± 1.7166… none of these 3. Question: A standard IQ test has a mean of 98 and a standard deviation of 16. We want to be 95% certain that we are within 8 IQ points of the true mean. Determine the sample size. Your Answer: 11 15 16 none of these 4. Question: Interpret a 99% confidence interval of (5.355, 5.445). 5. Question: The bus driver’s union claims that the mean age of bus drivers in Los Angeles is 50.1 years. If a hypothesis test is performed, how should you interpret a decision that fails to reject the null hypothesis? 6. Question: The owner of a professional basketball team claims that the mean attendance at games is 18000. a hypothesis test on this would be Your Answer: two tailed left tailed right tailed 7. Question: Find the critical value for a right tailed test with alpha = .05 and n = 75. Your Answer: 1.28 1.96 2.33 1.645 8. Question: Find the critical values for a two tailed test with alpha = .10 and n = 100. Your Answer: ± 1.28 ± 1.645 ± 2.33 none of these Points Received: 0 of 49. Question: A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1050 hours. A homeowner selects 40 bulbs and finds the mean lifetime to be 1030 hours with a standard deviation of 80 hours. Test the manufacturer’s claim. Use alpha = .08.

Place your order
(550 words)

Approximate price: $22

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:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
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.

Read more

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.

Read more

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.

Read more

Privacy policy

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.

Read more

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.

Read more