## Correlations and likert scales: What is the bias?

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…

## Workgroup: Doing Bayesian Data Analysis: A Tutorial Introduction with R and BUGS

I started a workgroup for going thru the Doing Bayesian Data Analysis: A Tutorial Introduction with R and BUGS book. See thread on forum.

## Is the summed cubes equal to the squared sum of counting integer series?

Martin Gardner is 100 today. 1³+2³+3³+4³ = 100 = (1+2+3+4)². Does the sum of the first numbers cubed always equal the square of their sum? — Matt Parker (@standupmaths) October 21, 2014 R can tell us: DF.numbers = data.frame(cubesum=numeric(),sumsquare=numeric()) #initial dataframe for (n in 1:100){ #loop and fill in   DF.numbers[n,”cubesum”] = sum((1:n)^3)   DF.numbers[n,”sumsquare”]…

## Paper: Revisiting a 90-year-old debate: the advantages of the mean deviation

Actually im busy doing an exam paper for linguistics class, but it turned out to be not so difficult, so i spent som time on Khan Academy doing probability and statistics courses. i want to master that stuff, especially the stuff i dont currently know the details about, like regression. anyway, i stumpled into a…

## Paper: Musical beauty and information compression: Complex to the ear but simple to the mind? (Nicholas J Hudson)

I was researching a different topic and came across this paper. I was rewatching the Everything is a remix series. Then i looked up som mor relevant links, and came across these videos. One of them mentioned this article. Complex to the ear but simple to the mind (Nicholas J Hudson) Abstract: Background: The biological…

## Something about certainty, proofs in math, induction/abduction

This conversation followed me posting the post just before, and several people bringing up the same proof. Aowpwtomsihermng = Afraid of what people will think of me, so i had Emil remove my name-guy [09:57:00] Emil – Deleet: http://mathbin.net/109013 [09:58:50] Aowpwtomsihermng: Your mates know their algebra. [10:00:09] Emil – Deleet: this guy is a mathematician…

## An alternative way to calculate squares.. without using multiplication

I was once at a party, and i was somewhat bored and i found this way of calculating the next square. It works without multiplication, so its suitable for mental calculation. Seeing that i have recently learned python, here’s a python version of it: n = 10 # how many sqs to return b =…