Stats Doesnt Suck

4: Variability

Current Status

Not Enrolled

Price

Included with course

Get Started

Chapter Content

Variability Explained Without Math

Why Measure Variability?

Variance and Standard Deviation

Deviations From The Mean

The Variance (to the rescue!)

The Standard Deviation

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