1. Psychology 202a Advanced Psychological Statistics September 17, 2015

2. The Plan for Today Conditional distributions. Conditioning on continuous variables. Introducing the concept of random variables and probability distributions.

3. Conditional distributions Systematically compare each aspect of the shape of a distribution. Tools for doing this in SAS. Tools for doing this in R.

4. Conditional distributions What about conditioning on a continuous variable? Ways to understand (don’t do this at home)‏ –The infamous median split –The quartile split –Ad infinitum Scatterplots in R