## Introduction to Measure of Dispersion

A modern student of statistics is mainly interested in the study of variability and uncertainty. In this section we shall… Click here to read more

From basic to higher mathematics

A modern student of statistics is mainly interested in the study of variability and uncertainty. In this section we shall… Click here to read more

For the study of dispersion, we need some measures which show whether the dispersion is small or large. There are… Click here to read more

Range Range is defined as the difference between the maximum and the minimum observation of the given data. If $${x_m}$$… Click here to read more

Quartile Deviation Quartile deviation is based on the lower quartile $${Q_1}$$ and the upper quartile $${Q_3}$$. The difference $${Q_3} –… Click here to read more

The mean deviation or the average deviation is defined as the mean of the absolute deviations of observations from some… Click here to read more

The standard deviation is defined as the positive square root of the mean of the square deviations taken from the… Click here to read more

Examples of Standard Deviation This tutorial covers some examples of standard deviation using all methods which are discussed in the… Click here to read more

Coefficient of Standard Deviation The standard deviation is the absolute measure of dispersion. Its relative measure is called the standard… Click here to read more

Uses of Coefficient of Variation Coefficient of variation is used to know the consistency of the data. By consistency we… Click here to read more

Variance is another absolute measure of dispersion. It is defined as the average of the squared difference between each of… Click here to read more

Sheppard Corrections In grouped data the different observations are put into the same class. In the calculation of variation or… Click here to read more

Like combined mean, the combined variance or standard deviation can be calculated for different sets of data. Suppose we have… Click here to read more

Lack of symmetry is called skewness. If a distribution is not symmetrical then it is called a skewed distribution. So,… Click here to read more