Posts tagged: undergraduate
The Binomial Distribution: Counting Successes in Fixed Trials
How the binomial distribution models the number of successes in a fixed number of independent trials, and why the formula looks the way it does.
The Poisson Distribution: Modeling Rare Events at a Known Rate
The Poisson distribution models counts of independent events occurring at a constant rate. One parameter does everything, and that turns out to be enough.
Correlation Is Not Causation, Illustrated With Cat Food
A study shows premium cat food extends feline life. It probably doesn't. A walkthrough of confounders, causal DAGs, and collider bias — the machinery behind each illusion.
Discrete vs Continuous Distributions: PMF, PDF, and CDF
The difference between discrete and continuous probability distributions, explained through the PMF, PDF, and CDF — with cat examples that are doing actual work.