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Stats

R Tip: Making a random distribution and then exporting it

I had a need for a text file with a random normal distribution in it today, so I looked around and found this tip from Paul Johnson's R page. table = rnorm(40, .1, .01) # assigns a random normal with 40 elements with mean .1 and SD .01 to table write.table(table,file="table.txt") #exports to a text file

One can never have enough pseudorandom numbers.

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Has Intelligence Declined in the Modern Era?

Has Intelligence Declined in the Modern Era?

I mentioned this subject a couple of times before. Simple reaction time data from Woodley et al.Bruce Charlton is the first person I know of to discuss the implications of the change in simple reaction time data in the paper by Woodley et al. Charlton claims the data shows

Fermi Problems

Fermi Problems

Geoff Canyon has a post about Google's tricky interview questions. Microsoft is also known for asking these kind of questions during interviews, and you can run into them anywhere in the technical world. Also known as Fermi problems or back-of-the-envelope calculations, I ran into these a lot during

Stats Package Comparison

A fun post exploring the differences between a number of statistical computation packages. As one of the commenters said, this is an awesome flame war! The comments are very informative, with all sorts of historical information explaining how and why certain packages turned out the way they are. I use

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