I got some selected cases from the OCC1990 in the years '60, '70 and '80, but every case’s PERWT has same value, 20. I’m not sure how to interpret this mean. Although I can’t believe that well, does the PERWT value of 20 mean that the case represents 20 people with the same characteristics?
I’m sorry to ask basic question.
Thank you for your help.