Randomization Test for a Difference in Mean

In this post, I’ll describe a technique for determining whether the mean of two sets are significantly different. In a previous post I demonstrated how to perform the standard statistical tests using R. Randomization tests are convenient when you can’t say anything about the normality or homoscedasticity (constant variance) of the population, and/or you don’t have access to a truly random sample.

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An Introduction to Vim

This post will represent some running notes regarding the use of the Vim editor. Why should you use something as arcane as Vim you ask? Well, sometimes you find yourself on a server or something that doesn’t have any other editors, so you should be know some Vim basics. Plus, it’s fun.

Vim is built on vi, an even more bare-bones editor. At the outset you should know that Vim has two modes, normal or command mode, and edit or insert mode. You add words and stuff in edit mode, and you perform operations like searching, saving, and moving around in normal, or command mode. (I prefer the edit/command terminology.) You can always get into the command mode by hitting ESC.

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