Assignment #7: Chi-Square Test of Independence
 

1. Pick 2 categorical variables from GSS with at least three responses each. Would you expect your two variables to be statistically independent from one other? Why or why not?

2. Show the table of counts (cross-tab) and generate the Pearson's chi-square.

3. Decide whether or not to reject the hypothesis of independence of the responses to the two survey questions.

4. Turn in:
    1) your output and
    2) a brief write-up answering the question in #1 and explaining a) the value and statistical significance of your Chi-square statistic, b) whether or not you reject the null, c) whether or not your two variables appear to be independent, and d) your own hypothesis as to why this might be so.
 

Hint: The Example provided should prove useful.
 
 

To open the GSS93 subset file:

On the hard drive open Program Files, then SPSS, then GSS93 subset.
 
 

To produce the Chi-Square output in SPSS, from the menus choose:
         Analyze
            Descriptive Statistics
                  Crosstabs...
         Click "Reset" to restore the dialog box defaults, and then select:
            ·Row(s): (variable 1)
            ·Column(s): (variable 2)
        Statistics ...
            Put a check beside "Chi-square"
        Click "Continue" and "OK."
 
 

For more information on the General Social Survey variables, go online to
   http://www.icpsr.umich.edu/GSS/