In a study of brain waves during sleep, a sample of 29 college students were randomly separated into two groups.

1. In a study of brain waves during sleep, a sample of 29 college students were

randomly separated into two groups. The first group had 15 people and were each

given ½ liter of red wine before sleeping. The second group had 14 people and were

given no alcohol before sleeping. All participants when to sleep at 11 PM and their

brainwave activity was measured from 4-6 AM. The group drinking alcohol had a

mean brainwave activity of 19.65 hertz and a standard deviation of 1.86 hertz. The

group not drinking alcohol had a mean of 6.59 hertz and standard deviation of 1.91

hertz. Compute a 90% confidence interval for the difference in population means of

groups drinking alcohol before sleeping and those not drinking alcohol before

sleeping. Explain the meaning of the confidence interval.

2. A study comparing children’s reading age (in months) was developed using identical

twin toddlers. One set of 6 twins played for 2 hours each day with educational toys

(experimental group), the corresponding set of 6 twins played for 2 hours each day

with non-educational toys (control group). The mean difference in reading age

between the experimental group and control group of 6 sets of twins was -2.33

months and the standard deviation of the sample difference was 2.16 months. Set

up a hypothesis test to determine if there is a difference between the 2 groups and

use the appropriate sample test statistic to determine if the difference in reading age

is significant at the 5% level.

3. Discuss the following:

a. What type of data can be examined using the Chi-Squared Te

b. What is the only constraint in using Chi-Squared Tests?

c. What problems can be caused by the way the data have been grouped?

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