Explore BrainMass
Share

# Regression Analysis: AIU Job Satisfaction Data Base

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

3 pages
Details: Using Excel as your processing tool, work through three simple regression analyses.

First run a regression analysis using the BENEFITS column of all data points in the AIU data set as the independent variable and the INTRINSIC job satisfaction column of all data points in the AIU data set as the dependent variable. Create a graph with the trendline displayed. What is the least squares regression line equation? What are the slope and the y-intercept? What is the R-squared value?
Next, run a regression analysis using the BENEFITS column of all data points in the AIU data set as the independent variable and the EXTRINSIC job satisfaction column of all data points in the AIU data set as the dependent variable. Create a graph with the trendline displayed. What is the least squares regression line equation? What are the slope and the y-intercept? What is the R-squared value?
Next, run a regression analysis using the BENEFITS column of all data points in the AIU data set as the independent variable and the OVERALL job satisfaction column of all data points in the AIU data set as the dependent variable. Create a graph with the trendline displayed. What is the least squares regression line equation? What are the slope and the y-intercept? What is the R-squared value?
Finally, make very specific comments and give reasons regarding any similarities or differences in the output results. Which regression produces the strongest correlation coefficient result? Why?
Be sure to provide references in APA format for any resources you may use.

Points Possible: 150
Date Due: Sunday, Aug 23, 2009
Objective: Construct charts and diagrams to interpret data.
Calculate and interpret the correlation between variables.

Submitted Files: Submit Assignment
Score: N/A

In the first three parts you will do three regression lines, that are INTRINSIC = b * BENEFITS + a, EXTRINSIC = b * BENEFITS + a, and OVERALL = b * BENEFITS + a. Page 546 has directions on how to compute correlations and regression lines in Excel. Use all 25 data rows of the three columns, no samples no extra numbers, and no partitioning!
Be sure to present three regression equations with R-squared value and three graphs. Provide the following summary table.

a
b
R2

1)

2)

3)

Make an XY (scatter) plot and include the trendline. In Excel, you need to highlight the two columns you want to graph to make the scatter gram. In Office 2007 which is the official AIU version, under insert is all of the graphs. You need to have the graph highlighted then under layout is trendline. In Office 2003, after you have made the scatter plot, there is an "add trendline" option under the Chart menu. Don't forget to do the fourth part. Write this as a coherent integrated report with an introduction, description of methods, results, interpretation of results, and conclusion, with references.