Home » The ideal (daytime) noise-level for hospitals is 45 decibels with a

The ideal (daytime) noise-level for hospitals is 45 decibels with a

The ideal (daytime) noise-level for hospitals is 45 decibels with a standard deviation of 10 db. A simple random sample of 81 hospitals at a moment during the day gives a mean noise level of 47 db. Assume that the standard deviation of noise level is really 10 db. All answers to two places after the decimal.
(a) A 99% confidence interval for the actual mean noise level in hospitals is(______db , ______db)

(b) We can be 90% confident that the actual mean noise level in hospitals is______db with a margin of error of______db.


(c) Unless our sample (of 81 hospitals) is among the most unusual 2% of samples, the actual mean noise level in hospitals is between______db and ______db.

(d) A 99.9% confidence interval for the actual mean noise level in hospitals is (______db, ______db).


(e) Assuming our sample of hospitals is among the most typical half of such samples, the actual mean noise level in hospitals is between______db and ______db.

(f) We are 95% confident that the actual mean noise level in hospitals is______db,  with a margin of error of______db.


(g) How many hospitals must we examine to have 95% confidence that we have the margin of error to within 1 db? ______.

(h) How many hospitals must we examine to have 99.9% confidence that we have the margin of error to within 1 db? ______.

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