Dispersion
By Levi Clancy for Student Reader on
updated
| Term | Overview |
|---|---|
Range | This can either be presented by giving the minimum and maximum (ie, 100 to 150) or just the amount between (ie, 50). |
Population Variance | σ2 = (Σ(x-µ)2)/N |
Population Standard Deviation (σ) | σ = √σ2 |
Sample Variance | |
Sample Standard Deviation | |
Empirical Rule | |
Interquartile Range | |
Interquartile Division | |
Mean absolute deviation | Mean absolute deviation from the mean measures dispersion but not often used. Mathematically better is the sample standard deviation, which is the square root of the sample variance. MAD = [ Σ | X - X | ] / n |