SPSS Assignment 3: Regression Lines
This and subsequent tutorials assume you have completed previous tutorials.
In this tutorial you will learn how to determine the coefficient and constant (slope and intercept) for
a regression line and how to add a regression line to a scatter plot. You will also learn more about
formatting scatter plots.
We will use the same data as in the last tutorial. If you have saved this data, you can double click on
it to start SPSS and load the data. Otherwise, start SPSS as before and go to the data entry screen,
SPSS Data Editor. In the first four columns, enter the data from problem 9 on page 137 of your
text. You’ll want to enter the x and y values from part a but just the y values from parts b and c—
the x data is the same for all three parts. Click on the Variable View tab at the bottom. Change the
variable names to x, y1, y2, and y3 and the number of decimal places to 0 for each. When you return
to the Data View tab, your screen should look something like this: (I’m using an older version of
Widows so there may be some minor differences.)
From the Analyze menu, select Descriptive StatisticsDescriptives…. In turn, click on each variable
and then the arrow button between panes to add each variable to the Variables(s) column.
