A clinical trial is run to evaluate the efficacy

A clinical trial is run to evaluate the efficacy of a new medication to relieve pain in patients undergoing total knee replacement surgery.  In the trial, patients are randomly assigned to receive either the new medication or the standard medication.  After receiving the assigned medication, patients are asked to report their pain on a scale of 0-100 with higher scores indicative of more pain.  Data on the primary outcome are shown below.

Sample Size
Mean Pain Score
Standard Deviation of Pain Score
New Medication
60
30.31
7.52
Standard Medication
60
53.85
7.44
Because procedures can be more complicated in older patients, the investigators are concerned about confounding by age.  For analysis, patients are classified into two age groups, less than 65 and 65 years of age and older.  The data are shown below.
Age < 65 Years
Sample Size
Mean Pain Score
Standard Deviation of Pain Score
New Medication
40
25.30
2.46
Standard Medication
25
45.51
1.83
Total: Age < 65 Years
65
33.07
10.16




Age 65+ Years
Sample Size
Mean Pain Score
Standard Deviation of Pain Score
New Medication
20
40.33
2.16
Standard Medication
35
59.80
2.49
Total: Age 65+
55
52.72
9.74
1. Is there a statistically significant difference in mean pain scores between patients assigned to the new medication as compared to the standard medication?  Run the appropriate test at .05.  (Ignore age in this analysis.)







Calculate Your Essay Price
(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

Order your essay today and save 10% with the coupon code: best10