Measures of Dispersion

Range and Quartile

Introduction

The extent to which the numerical data in any distribution differs from each other is known as dispersion. Objectives of measuring dispersion are: to test the reliability of an average, to serve as a basis for control of variability, etc.

The properties of an ideal measure
.... Read More

Mean Deviation

Introduction

Dispersion is defined as the extent to which values differ from their average. Mean deviation of a series is the arithmetic mean of the absolute deviation of various items taken from central values i.e. Mean, Median or Mode. Mean Deviations are absolute, which implies positive (+
.... Read More

Standard Deviation

Introduction

Standard deviation is the square root of arithmetic average of the squares of the deviations measured from mean. It was introduced by Karl Pearson in 1823. The relative measure of standard deviation is measured as the ratio of standard deviation with mean. It is also termed coeff
.... Read More

To Access the full content, Please Purchase