After completing the assigned readings and watching the recommended videos, consider all that you have reviewed and think about the issues and analysis you completed in Assignment 3.1.

Word Count: 300

Instead of the benchmark data used in Assignment 3.1 that are derived from state estimates using AHRQ H-CUP data, you choose to use the ALOS figures found in the Federal Register for 2014:

CMS Data

The CMS Data PDF contains each MS-DRG with charge and patient days (Average Patient Days = ALOS) for 2014. These figures are what CMS reported for 2014. Use the z-test function to test the hypothesis for each of the three MS-DRGs: 291, 292, 293.

You have some familiarity with the Excel software and you have read about finding probabilities using standardized scores. You decide to answer the probability question posed above using Excel’s z.test function given as:

=z.test(range:range,pdf ALOS), where range:range represents the cells where the facility data are located, and pdf ALOS is the national average against which to compare.

For a demonstration of how to use Excel’s z test function, view the video tutorial Calculating a z test in Excel (Transcript of Calculating a z test in Excel Tutorial)

The results of this test will tell you the probability that you will reject the null hypothesis when it is actually true (i.e., that you will say your ALOS is greater than the benchmark when in reality your ALOS is not statistically different than the benchmark). This is known as a “Type I” error, and you want the probability of making this type of error to be as small as possible. The conventional threshold (or comfort level) for making this type of mistake is five percent (i.e., you are willing to accept that in five samples out of 100 you will mistakenly reject the null hypothesis when it is true). Naturally, a probability that is smaller is preferred since the likelihood of having made a mistake is smaller. This is essentially what a “p-value” represents: the probability of making a Type I error (of rejecting the null hypothesis when it is true, or in practical terms, concluding that a difference exists when in reality none exists).

Run your calculations using the data specified above to determine if your facility’s ALOS for heart failure is consistent with that of all Medicare heart failure patients. Then, construct a brief so that you can replicate your analysis at some future date. Your brief should include the following:

1. Discuss whether, in future analyses, you will collect data from a sample of heart failure patients at your facility or look at all heart failure patients at your facility. Be sure to support this decision.
2. Distinguish between the statistics and parameters that you are using (i.e., what are the statistics and what are the parameters?).
3. Once you have estimated the probabilities for each MS-DRG, explain whether you believe your facility has ALOS that are within an acceptable range (i.e. are statistically the same) compared to the national average.
4. Paste a screenshot of your Excel calculations into the last page of your assignment submission.

## 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:
Number of pages
Urgency
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.