Spread: Variance and Std Dev
How wide your data really is.
Center Is Not Enough
Two columns can share the same mean yet look nothing alike. To tell them apart you measure their spread, how widely the values scatter. 📏
Deviation From the Mean
Spread starts with each point's distance from the average, its deviation. Small deviations mean tight data, large ones mean it sprawls.
All lessons in this course
- Mean, Median, and Mode
- Spread: Variance and Std Dev
- Min, Max, and Quartiles
- Outliers and What They Mean