Author Archives: pmean

Recommended: How to Clone Your Raspberry Pi SD Cards With Windows

I’m building a cluster of Raspberry Pi computers to run Hadoop and one of the tasks that I need is to make working backups of the micro SD cards that these computers use to store their operating system. This page takes you carefully through all the steps you need to make a backup and then to restore it to a different micro SD card. Continue reading

PMean: Grading rubric for computer assignments

I’ve been teaching a variety of classes that require students to run a statistical analysis in a package like SAS or R and report the results. There is a tremendous variety of formats that students use, and I thought it would be helpful to offer some guidance. It would save me time in grading, but more importantly it would emphasize that students need to think about what they produce rather than just tossing together whatever comes out of the computer. The five requirements for homework assignments are they be complete, concise, clear, error-free, and interpretable. Continue reading

Recommended: A Review of Published Analyses of Case-Cohort Studies and Recommendations for Future Reporting

I got a question about how to analyze a case cohort study in Stata. The person was following the code in a Stata conference presentation but was unsure about some of the details. Always looking for simple explanations that I myself don’t understand well, I found this nice article on how these case cohort studies are written up in the literature. Naturally, it provides a brief explanation of how you analyze data from a case cohort design along with several helpful references. Continue reading

Recommended: How to be more effective in your professional life

This article starts with a nice anecdote about being dismissive about what someone else is saying ends up hurting you. It also provides a nice structure, POWER, for organizing consulting meetings. POWER stands for Prepare, Open, Work, End, and Reflect. This article was a basis for some of the content in an interesting webinar on consulting. Continue reading