I am having trouble understaing which part of the SPSS file to use to answer the question. Which column do I use to indicate "class intervals"? And how do I transform them? The question I am working on is below.

Cross tabulate "Do you currently have a wireless service from a carrier other than AT&T Wireless" (Q3) with the demographic variables (recoded Q8-Q11). What does it mean? Provide your narrative in the note taking function in the SPSS output file. see notes below Note: (You will need to first examine each of the variables to ensure that they are either nominal or interval with 10 or fewer class intervals. To do this go to variable view in the data file. If some variables have greater than 10 class intervals or are ratio data you will need to transform these variables into new variables with say 4 categories. By running a frequency distribution and examining the range plus highest and lowest data values you should be able to determine how many categories to create and the data range that you will need to specify for each category. You should have no problem creating these new variables as you practiced the transform function in Assignment 3. Use this procedure whenever you have to do a cross- tabs)