To:  sbaker@odu.edu

From:  Thomas Meyer
tmeyer@ph.vccs.edu
276 656-0283
Patrick Henry Community College

Subject:  Statistics - w/  Dr.Spencer Baker - Homework Assignment #3, Ch 7 - Problem 14, page197.

Date: March 18, 2004

Here's the general algorithm for doing this problem:

1.  Get the data

2.  Manipulate the data

To do a scatterplot:
Select Graph
Scatterplot
Define (followed by reset if necessary)
Move the independent variable  (also called the predictor variable) to the x-axis
Move the dependent variable (also called the criterion variable) to the y-axis
Click OK

To plot a linear regression between the independent and dependent variable on the scatterplot:
(See text page 188-189 for instructions.)
Double-click the scatterplot to invoke the Graph Editor
From Chart Menu, select Options...
Click Fit Line Total box
Click OK

3.  Do something with the data

Right-click the scatterplot and regression diagram box
Select copy object
Paste the copied object into FrontPage
Save your work
Send it on to the instructor



 

Question:
Use the SPSS program and SPSS data bank to find the scatter plot for each of the following.  In addition, insert the regression line that best fits the data. [Note: For the variable postatt, the higher the score, the more negative the attitude toward math.]

a.    The predictor variable (independent variable) post-instruction math attitude (postatt) and the criterion variable (dependent variable) final algebra grade point average (algpa) from the data file math.sav.

Answer:

Question:
 

b.    The predictor variable (independent variable) post-instruction math attitude (postatt) and the criterion variable (dependent variable) mathematics score the Iowa Test of Education for 9th Graders (ited9) from the data file math.sav.

Answer:

Question:
 

c.    The predictor variable (independent variable) confidence in doing mathematics (confmath) and the criterion variable (dependent variable) final grade in mathematics (fingrd) from the data file career. sav.

Answer:

Question:
d.    The predictor variable (independent variable) empathic concern (empathy) and the criterion variable (dependent variable) altruism (altruism) from the data file donate.sav.

Answer:

filename: StatHW7Ch4Prob14page197TomMeyer.doc