Logistic regression: odds ratios

See http://www.chrisbilder.com/categorical for my book and http://www.chrisbilder.com/stat875 for my course notes. This section discusses logistic regression. The video was created for STAT 875 at the University of Nebraska-Lincoln. The purpose of the course is to provide an introduction to categorical data analysis for statistics and non-statistics graduate students. The first way to interpret an odds ratio at 4:38 in the video should not be used! A second "as" would somehow need to be included for it to be correct (see p. 94 of the book when comparing x + c to x in a formal interpretation). The second way to interpret (4:58) should be used instead. This change needs to be made in other videos and notes after this point of the course.