We will illustrate the chi square test for independence using the
data from Table 5.2. We have entered the information from this table
into a SPSS data file and saved the file
elsewhere on this
*Student Resource Website*. We will test to see whether men and
women differ in their political affiliations.

We start by opening the SPSS program and loading the Table 5.2
data file, which gives us this screen. The
chi square test for independence is performed in the *crosstabs*
section. To get to that section, select the *Analyze* menu, the
*descriptive statistics* submenu, and the *crosstabs*
choice, which gives you this screen.

You want to set up the analysis as if you were doing a cross-tabulation of sex by political affiliation. So we will move the variable of sex to rows box and party affiliation to the columns box, as shown in this screen. Actually, it does not matter which of the variables go in which box, as long as one goes in one box and the other in the other box.

To compute a chi square test for independence, you click on
statistics, which opens this screen. You
select the chi square option as shown, click continue to return to
the *crosstabs* box, and then click OK to run the analysis,
which gives you this screen.

The chi square value for this analysis is 4.86, with 2 degrees of
freedom. The *p*-value for this chi square is 0.88, which falls
short of the traditional alpha level of .05. Therefore, we fail to
reject the null hypothesis that men and women do not differ on the
pattern of party affiliations.

We have prepared an animation that will walk you through this procedure. To run the animation, simply click on the title of the animation in the table below.

Note that we do not recommend that you try to run the animations if you have a slow connection, such as a dial-up connection. You will find that the animations take forever to load with a slow connection.