Exams 4 and 5 use information contained in the SPSS file named Exam4-5_S06.sav. The file contains information on three variables:
- Student Number
- Total Exam Points - The dependent variable Y, gives the total exam points for each student
- Total Quiz Points - The independent variable X, gives the total quiz points for each student
You will need to run the following analysis to answer questions on Exam 4 and 5. For each topic, the SPSS commands are given.
- Descriptive Statistics
- Analyze -> Descriptive Statistics -> Descriptive: Choose
Total Exam Points, and Total Quiz Points. SPSS will open up an Output
Viewer. Leave it open, and go back to the SPSS file for the next part.
- Graphs
- Graphs -> Boxplot -> Simple (choose Summaries of
Separate
Variables in the checkbox), and then click on Define. Choose Total
Exam Points, and Total Quiz Points. Leave the Output Viewer open.
- Regression
- Analyze -> Regression -> Linear Regression. Dependent
Variable is Total Exam Points, Independent Variables is Total Quiz
Points. Click on Save, and check Standardized Residuals. Click on Ok to
run Regression. Keep Output Viewer open, and go back to your SPSS file.
You will notice that you now have one additional column, ZRE_1, which
is the standardized residual.
- Graphs -> Scatter/Dot -> Simple Scatter. Choose Total
Quiz Points for X Axis, and the new variable ZRE_1 for Y Axis. Leave
the Output Viewer open.
- Analyze -> Correlate -> Bivariate. Choose Total Exam Points and Total Quiz Points. Save the output, and print.
Questions that depend on the above SPSS file will indicate it clearly.
In the exam, you don't have to download the file again if you have
already done the above analysis.
Please do not start Exams 4 or 5 until you have completed the above
analysis, and have your printout handy when you take the exams.