I'm not sure if this is more of SPSS question of more of a statistical design question, but I'm hoping someone can give me some advice.  I'm using the "complex samples" feature to take a sample of 65 records from a universe of 146 records.  I'm stratifying on 3 variables.  One variable is poverty which is two options (above or below poverty level), one variable is geography (urban, suburban, and rural), and one field is distance (which is a yes/ no question).  So I set up the counts that I'd like to take within each combination of elements (12 possibilities) and used those counts to draw the sample (we are oversampling on rural and using the population proportions for the rest of thesample).

My problem is that there are some missing values for each of the fields.  So instead of getting sample back of 65, I'm getting 55 back.  I think the missing values on the strata is causing the sample to not return the requested counts.

Is there a way deal with missing values on a strata in SPSS?  Is there some way I should calculate the counts in a strata where one of the fields is missing?

Hopefully my question makes sense.

Thanks for any help or advice you can provide!