This half-day tutorial shows you how to do Bayesian data analysis, hands on. The software is free; see installation instructions, below, before arriving at the tutorial. The intended audience is grad students and other researchers who want a ground-floor introduction to Bayesian data analysis. No mathematical expertise is presumed. If you can handle a few minutes of summation notation like Σixi and integral notation like ∫ x dx, you're good to go. Complete computer programs will be worked through, step by step. ...