dr. Willem Sleegers
Projects
LIME
A website to explore and analyze intervention studies to reduce animal product consumption.
Cognitive Dissonance RRR
A large-scaled replication study of a seminal finding from the cognitive dissonance literature.
tidystats
A collection of software tools to reproducibly report statistics.
Latest Apps
Three-Point Project Planner
A project estimation tool that uses three-point estimation and Monte Carlo simulation to predict realistic project completion times.
Test Survey Tool
An application that converts structured text files into interactive survey questionnaires suitable for user testing.
Type to Read
A typing practice app that lets you improve your typing speed and accuracy while reading content you want to read.
Latest Posts
Understanding Regression (Part 4): Uncertainty and the Standard Error
Every estimate is based on a sample, and a different sample would give different results. This post builds intuition for what that means: simulating how much the sample mean would vary across studies and deriving the standard error formula.
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Understanding Regression (Part 3): Estimating Parameters
We've chosen the normal distribution to describe heights. Now we need to estimate its parameters μ and σ from our sample. This post shows that lm() does exactly this: the intercept estimates μ (the mean) and the residual standard error estimates σ.
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Understanding Regression (Part 2): Why the Normal Distribution?
In Part 1, we proposed that regression is about choosing and fitting distributions to data. In this post, we explain why the normal distribution is often the right choice.
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