SPSS:

1. View the variable information for the variables RA1SR1, RA1SG11, and RA1SA1 in the MIDUS2011 file you are using.
   
   1. Click on the “variable list” icon or choose Utilities/Variables from the menu.
2. At which levels (nominal/categorical, ordinal, interval, ratio) is each of these variables measured? (By the way, DK means “Don’t Know,” NA means “No Answer,” and NAP means “Not Applicable.”)

Online:

1. View the variable information for the variables RA1SR1, RA1SG11, and RA1SA1 in the MIDUS2011 file you are using.
   
   1. In the online analysis tool, click on “codebook” in the banner across the top of the page.
   2. On the left-hand side of the screen, select “standard variable list.”
2. At which levels (nominal/categorical, ordinal, interval, ratio) is each of these variables measured?