Part IV Practice Problems on Correlation and Regression

Formula Reviews From Quick Notes Statistics may help with these problems.
When printing, highlight just the problems and not the advertising and then choose File, Print, Section, and OK.

Please Blog Friends About This Free Library Using

 

Our Statistics Tutors  
can help with difficult questions.

Our  Statistics Specialty Store
and Statistics Learning Center
also have learning materials that may help.


Problem Answers

Answer the following questions concerning the relationship between average sick days taken over the past 5 years by senior managers and their performance rating using the this data. Be sure to show all mathematics calculations.
 


Average Sick Days Taken 1995-1999

ID Number           AA1            AB2          AC3           AD4            AE5
Sick days taken 4 8 3 7 1
Performance Rating 8 2 7 4 9
1. Draw a scatter diagram of this data and calculate the coefficient of correlation to determine if average sick days taken over the last 5 years has an affect on a senior manager's most recent performance rating.















2.   Calculate the coefficient of determination and the coefficient of nondetermination.





3.   Using complete sentences, interpret your answers to questions 1 and 2.





4.   Could rho be zero at the .01 level of significance? Franklin Pierce college students may skip this question.





5.   Using the method of least squares, determine the regression equation for this data and draw it on your graph.









6.   Calculate the expected performance rating for a senior manager who averaged 5 absences per year over the 
      past 5 years.








 

Our Tutors
Available 24/7 
Accounting  
Career Services
Corporate Law
Economics  
Education    
Employment Issues
Desktop Publishing  
e-commerce  
Graduate Education>
 
Industrial Products

International Business
Investment
Management  
Marketing
 
Mathematics
 
Nursing
Physics  
Programming
 
Psychology
Secretarial-Services
Social Science

Statistics  
Writing Services

 

Free Book Summaries- 3 New York Times Bestsellers

Our Tutors Available 24/7
Accounting     Career Services     Corporate Law     Economics   Education    Employment Issues
Desktop Publishing      e-commerce      Industrial Products     International Business
Investment     Management      Marketing     Mathematics     Nursing    Physics  
Programming
     Secretarial-Services     Social Science     Statistics      Writing Services

Problem Answers

1. -.952     

Please visit Our Sponsors.

Our Statistics Tutors can help with difficult questions.

Statistics Specialty Store

Statistics Learning Center
Our
SPSS tutors can help with difficult assignments.

Online Six Sigma Certification [Green Belt]will improve your resume.

Please support this site by shopping at amazon.com and
amazon.com for students
.

2. 90.6% and 9.4%
3. High negative, 90.7% of the variability in rating is accounted for by variability in absences and 9.3% of the variability in rating is not accounted for by variability in absences.
4. No
5. Y.x = 10.4 - .964x (Hint: when calculating b, you have a double negative so 4.43 is added to 6.)
6. 5.58

Quick Statistics Using Microsoft (TM) Excel
for the fastest and easiest way to do these and other statistical tests.

louis vuitton outlet lebron 12 louis vuitton outlet michael kors outlet michael kors outlet kate spade outlet Lebron 11 sport blue 6s michael kors outlet louis vuitton outlet louis vuitton outlet louis vuitton outlet Michael Kors Outlet michael kors outlet kate spade outlet foamposites shooting stars michael kors outlet kate spade outlet Michael Kors Outlet michael kors outlet