Measures Of Dispersion

coefficient of mean deviation

coefficient of absolute quartile deviation

coefficient of quartile range deviation

coefficient of mean absolute deviation

average deviation measures

availability measures

average measures

distance measures

4μ±4σ

3μ±3σ

μ±3σ

2μ±2σ

2

10

12.5

50

Pearson Theorem

Chebyshev’s Theorem

sampling theorem

population theorem

sigma squared

negative sigma

square root

cubic root

third quartile minus median

third quartile plus median

first quartile plus median

median multiply third quartile

2σ²

2Σxy

2Σ²

σ²

3⁄2 σ

2⁄3 σ

2μ⁄3 σ

4μ⁄3 σ

larger value of range deviation

smaller value of range deviation

larger value of quartile deviation

smaller value of quartile deviation