http://pumpkinperson.com/2015/04/13/is-the-sat-an-iq-test/ Blog commenter Lion of the Judah-sphere has claimed that the SAT does not correlate as well with comprehensive IQ tests as said IQ tests correlate with one another. At…
I ran into trouble trying to remove the effects of one variable on other variables doing the writing my reanalysis of the Noble et al 2015 paper. It was not…
Abstract In this commentary I explain how mean differences between normal distributions give rise to different percentages of the populations being above or below a given threshold, depending on where…
Abstract Researcher choice in reporting of regression models allow for questionable research practices. Here I present a function for R that reports all possible regression models given a set of…
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…
I made this: https://emilkirkegaard.shinyapps.io/Understanding_restriction_of_range/ Source: # ui.R shinyUI(fluidPage( titlePanel(title, windowTitle = title), sidebarLayout( sidebarPanel( helpText("Get an intuitive understanding of restriction of range using this interactive…
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 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…
I started a workgroup for going thru the Doing Bayesian Data Analysis: A Tutorial Introduction with R and BUGS book. See thread on forum.
https://twitter.com/standupmaths/status/524470545199673344 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"] = sum(1:n)^2 } library(car) #for the…