Dirty D's Blog tag:www.talkingpointsmemo.com,2008:/talk/blogs/dirty_d//5969 Movable Type Pro 4.21-en Dirty D recommended OVERDETERMINED: The Problem with Stratified Sampling Polls by Student Redux tag:www.talkingpointsmemo.com,2008:/talk/blogs/student_redux//4455.238430 2008-10-20T15:55:49Z 2008-10-20T16:02:22Z