Week 11Examining Relationships (Part 2): Linear Regression and Prediction
This week’s graded assignment involves the U.S. Air Force’s physical fitness testing standards,
which the Air Force strengthens and refines periodically. A recent change to these standards took
effect Oct. 21, 2013, and included the following (see http://www.afpc.af.mil/affitnessprogram/):
• body composition, which is evaluated by abdominal circumference measurements;
• an aerobics component, which is evaluated by a 1.5-mile timed run; and
• muscular fitness, which is evaluated by the number of push-up and sit-ups completed
within 1 minute.
According to the new standards, members who fail the abdominal circumference component but
pass the other components will be administered a body mass index (BMI) screen, and members
who do not pass the BMI will be administered a body fat analysis.
The data contained in the corresponding Excel file were acquired from the records of
members of the 114th Range Operations Squadron (114 ROPS) of the Florida Air National
Guard, which makes up one arm of the reserve component to the U.S. Air Force. The data file
consists of 114 ROPS’ physical fitness test (PFT) and BMI scores. For PFT scores, the higher the
score the more physically fit is the person. For BMI scores—which are calculated based on a
person’s height and weight and measure obesity—the higher the BMI score, the more overweight
and obese is the person. Your assignment is to analyze these data to determine the extent to
which the Air Force can predict service members’ PFT scores by their BMI scores. You are to
import this data set into your statistical software program and do the following (see the
corresponding “Guided Example” from the Gallo document for guidance):
A. Pre-Data Analysis
1. What is the research question and corresponding operational definitions?
2. What is the research methodology/design and why is this methodology appropriate?
3. Conduct an a priori power analysis to determine the minimum sample size needed. Is the
given data set sufficient relative to this minimum sample size? In what way do you think
the size of the given sample will impact the results?
B. Data Analysis
Using the data from the Excel file, conduct a hypothesis test as follows:
1. Formulate the null and alternative hypotheses in symbols and words.
2. Determine the test criteria.
3. Test for the four main assumptions of regression.
4. Run the analysis and record the results.
5. Perform an outlier analysis using Jackknife distances (there should be six outliers).
Compare the results of the analysis without outliers to the results with outliers present.
Determine whether you will keep the outliers or deleted them and explain the reasons for
6. Make a decision to reject or fail to reject the null hypothesis and write a concluding
C. Post-Data Analysis
1. Determine and interpret the effect size.
2. Determine and interpret the power of the study.
3. Determine and interpret the 95% confidence interval and comment on the AIPE.
4. Present at least three plausible explanations for the results.
5. Interpret the findings from a practical perspective.
Why Work with Us
Top Quality and Well-Researched Papers
We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.
Professional and Experienced Academic Writers
We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.
Free Unlimited Revisions
If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.
Prompt Delivery and 100% Money-Back-Guarantee
All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.
Original & Confidential
We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.
24/7 Customer Support
Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.
No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.
Admission Essays & Business Writing Help
An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.
Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.
If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.