Some time ago, I wrote on Reddit: There are two errors that I see quite frequently: Conclude from the fact that a statistically significant difference was found to that a significant socially, scientifically or otherwise difference was found. The reason this won’t work is that any minute difference will be stat.sig. if N is large […]
Restriction of range is when the variance in some variable is reduced compared to the true population variance. This lowers the correlation between this variable and other variables. It is a common problem with research on students which are selected for general intelligence (GI) and hence have a lower variance. This means that correlations between […]
A person on ResearchGate asked the following question: How can I correlate ordinal variables (attitude Likert scale) with continuous ratio data (years of experience)? Currently, I am working on my dissertation which explores learning organisation characteristics at HEIs. One of the predictor demographic variables is the indication of the years of experience. Respondents were asked […]
I started a workgroup for going thru the Doing Bayesian Data Analysis: A Tutorial Introduction with R and BUGS book. See thread on forum.
For a mathematical explanation of the test, see e.g. here. However, such an explanation is not very useful for using the test in practice. Just what does a W value of .95 mean? What about .90 or .99? One way to get a feel for it, is to simulate datasets, plot them and calculate the […]
So I found a textbook for learning both elementary statistics much of which i knew but hadnt read a textbook about, and for learning R. health.adelaide.edu.au/psychology/ccs/teaching/lsr/ book is free legally www.goodreads.com/book/show/18142866-learning-statistics-with-r Numbers refer to the page number in the book. The book is in an early version (“0.4”) so many of these are small errors […]
Two days ago, Blizzard posted some statistical data about the top 200 (really is 199) players in Europe. I did a bit of statistical analysis on that data and made some nice illustrations as seen below. The data is self-explanatory, but the explanation is unknown to me. It need not necessarily be the case that […]
Malintent: 78% of all statistics are completely made up. Wyz_sub10: …but only 31% of all people know that. Smullyan-esque: And 10 out of 9 people just can’t understand statistics at all. Deleet: Priceless! Kilde