PSY/BHV 395 Name:
Chapter 7 In-class assignment
Define the following terms:
Adjusted R-Square Degrees of Freedom Dummy Variables Intercept
Outliers Residuals Spurious Factors
To create a bivariate linear regression:
1. Open the STATES.sav data file
a. Click “Analyze”
i. Choose “Regression”
ii. Select “Linear”
1. in the “Dependent” box, select the variable “BIH29” (teenage
birth rate in 1997)
2. in the “Independent(s)” box, select the variable “PVS500”
(Poverty Rate 1998)
iii. Click “OK”
Examine your output:
1. What is the Unstandardized Coefficient? What does it mean?
2. Is the relationship statistically significant?
3. What is the R-Square value? What does this tell you?
To graph the regression line using the output from our analyses of the linear regression:
1. Open the STATES.sav data file
a. Click on “Transform” and then “Compute”
b. Input as the “Target Variable” a new variable called “BIRTHPRE”
c. In the “Numeric Expression” box, enter the equation: (15.160 +2.735 *) and
after the multiplication sign, select the variable “PVS500”
d. Click on the “Type and Label” box and label the variable “BIRTHPRE” as
“Predicted Teen Birth Rate From Poverty Rates”
e. Click “Continue”
f. Click “OK”
To plot this line:
1. Click on “Graphs” and select “Scatter”
a. Choose “Simple”
b. Click on “Define”
i. For the “Y Axis”, select the variable BIH29
ii. For the “X Axis”, select the variable PVS500
c. Double click the graph when it is generated
i. Click on “Chart”
1. Click on “Options”
a. In the “Fit Line” area, choose “Total”
2. Click “OK”
