Absolute Measures

Distinguish between absolute and relative measures of dispersion.

State the limitations of absolute measures of dispersion.

Absolute measures of dispersion are not suitable for comparing the variability of two data sets with different units.

Absolute Measure of Dispersion is one with units; it has the same unit as the initial dataset.

Define the Absolute Measure of Dispersion.

The Measure of dispersion is easily classified by checking whether they contain units or not.

The Measure of Dispersion is divided into two main categories absolute measures and relative measures.

Explain the types of measure measures of dispersion.

A good measure of dispersion should be based on all the observations of the series.

A good measure of dispersion should be capable of further mathematical treatment and statistical analysis.

A good measure of dispersion should not be unduly affected by sampling fluctuations.

What are the characteristics of a good measure of dispersion?

The following are some particulars of the distribution of weight of boys and girls in a class:

Find the standard deviation of the combined data.

The following are some particulars of the distribution of weight of boys and girls in a class:

Find the standard deviation of the combined data.

Calculate coefficient of mean deviation about mean for the following data:

$7,9,12,15,5,4,11$

Calculate coefficient of mean deviation about mean for the following data:

$7,4,10,9,15,12,7,9,9,18$

What are the merits and demerits of quartile deviation? Calculate coefficient of quartile deviation if $Q_1=16,Q_3=24$.

What are the merits and demerits of quartile deviation? Calculate coefficient of quartile deviation if $Q_1=15,Q_3=20$.

What are the merits and demerits of quartile deviation? Calculate coefficient of quartile deviation if $Q_1=40,Q_3=60$.

What are the merits and demerits of quartile deviation? Calculate coefficient of quartile deviation if $Q_1=15,Q_3=40$.