```Date: Fri, 9 Sep 2005 14:00:47 -0700 Reply-To: Chao Yawo Sender: "SPSSX(r) Discussion" From: Chao Yawo Subject: Stratified Sampling Comments: To: SAS-L , StataList Content-Type: text/plain; charset=iso-8859-1 Hi, I am teaching a sophomore social statistics course. I've been covering sampling, especially stratified sampling this week. The students need some assistance in explaining the weighting procedures associated with disproportionate stratified sampling. How can I demonstrate this in a class with a concrete example. Also, is there any guidelines as to how to oversample a particular stratum? Assuming i have 2 groups (males are 20% and Females=80%). If I am drawing a sample of 100 students - it means I would end up with 20 males and 80 females. If i need to oversample the males, what values should i chose - 30, 40, 50? - is the choice really arbitrary or is guided by theory or calculations? I will appreciate your thoughts on this. Regards, YC ______________________________________________________ Click here to donate to the Hurricane Katrina relief effort. http://store.yahoo.com/redcross-donate3/ ```

Back to: Top of message | Previous page | Main SPSSX-L page