Cute Gibbs sampling for rounded observations

I was attending a course of Bayesian Statistics where this problem showed up: There is a number of individuals, say 12, who take a pass/fail test 15 times. For each individual we have recorded the number of passes, which can go from 0 to 15. Because of confidentiality issues, we are presented with rounded-to-the-closest-multiple-of-3 data… Continue reading Cute Gibbs sampling for rounded observations

Analyzing a simple experiment with heterogeneous variances using asreml, MCMCglmm and SAS

I was working with a small experiment which includes families from two Eucalyptus species and thought it would be nice to code a first analysis using alternative approaches. The experiment is a randomized complete block design, with species as fixed effect and family and block as a random effects, while the response variable is growth… Continue reading Analyzing a simple experiment with heterogeneous variances using asreml, MCMCglmm and SAS

Mid-January flotsam: teaching edition

I was thinking about new material that I will use for teaching this coming semester (starting the third week of February) and suddenly compiled the following list of links: William Briggs writes It is time to stop teaching Frequentism to non-statisticians in a paper submitted to The American Statistician. Clearly he doesn't want to be… Continue reading Mid-January flotsam: teaching edition