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Statistics & AB Testing

Statistics & AB Testing

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Introduction to Statistics and A/B Testing
Hypothesis Testing
A/B Testing & Experiment Design
Confidence Intervals
A/B Testing Common Scenarios
A/B Testing Tradeoffs
Statistics
Generalized Linear Models and Regression

Confidence Interval Fundamentals

In the introduction, we mention a “confidence level,” but didn’t really elaborate on what we meant. So, let’s establish some vocabulary, both mathematically and in plain English

  • Sample: A collection of measurements from a subset of a population. Mathematically, this is a vector x=[x1,x2,,xn]\vec{x}=[x_1,x_2,\dots,x_n] made of nn elements (nn is called the sample size)
  • Statistic: Some summary measurement that can be computed
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