Looking for some advice regarding the sample size requirements for weighting data. I have a sample of 1100 approx and would like to weight the data to reflect the true population for gender, age, and state. I have adequate sample numbers in each gender, age and state. However I am using SPSS and it only lets me apply one weight at a time. I would like to apply all three weighting variables at once.
My questions are:
1. Is it possible to multiply my three weighting variables together for each case to determine a combined weight?
2. Do I need to have a decent sample (n>30) in each possible gender, age, and state combination?
Any comments or discussions regarding these issues would be appreciated.