Chapter 4: Variability
Variability Explained Without Math
- Why Measure Variability?
- The Range
Variance and Standard Deviation
- Deviations From The Mean
- The Variance (to the rescue!)
- The Standard Deviation
- Recap
- Example | Deviations From The Mean
- Example | Variance
- Example | Standard Deviation (plus checking your answers)
All the Essential Formulas
- Sum of Squares | Computational vs Definitional Formulas
- Sample Variance and Sample Standard Deviation
Understanding the Standard Deviation
- Using the Standard Deviation to Visualize a Distribution
- What is a Biased Estimator?
- How Changing the Data Affects a Standard Deviation
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