Tag: #biostatistics

Sample Sizes and Statistical Significance

Some dude said I didn’t know what I was talking about because, in his world, a small sample size with a statistical significance only gets more statistically significant if the sample size increases. He’s also an antivaxxer, so…

One-Way ANOVA Analyses, by Hand and in R

A student asked for help with a statistical analysis the other night, and I was happy to help. However, he threw me a curveball when he told me he needed to conduct an ANOVA test using only summary data. That is, all he had was the table of results (from a publication) and not the data. Doing an ANOVA by…

Biostatistics By Hand? Yes, Please!

When I was studying medical technology, my professors and mentors emphasized the need to learn to do by hand all of the procedures that automated instruments did. Those instruments, which are veritable robots, can do a complete cell count in a few minutes. Doing a complete cell count by hand takes at least an hour if you’re good and organized……

Don’t set public health policy based on some “very, very simple” statistics (Part 1)

Some people will tell you with a straight face that simple statistical analyses are better than complex ones that account for all sorts of different possible confounders. Not only that, but they’ll tell you that you should adopt public health policy based on simple comparisons between two groups. Let me tell you why this is dangerous… Why you should consider the universe surrounding your data.

More bad epidemiology from Dr. Brian S. Hooker and friends

Remember Dr. Brian S. Hooker? The PhD who published a seriously flawed — and now retracted — study in which he said that the MMR vaccine caused autism in African American male boys? Yeah, that one. Well, it appears that he has been busy trying to form a case for the legal action he has pending in the vaccine court.…