Illustrate the meaning of the term dispersion with examples.

Solution

Dispersion is a measure of the variation of the items. According to Prof. C.R. Conn, Dispersion is a measure of the extent to which the individual item vary. The measures of dispersion are required to measures the amount of variation of values about the central values.

Example : Suppose the monthly incomes in rupees of five house holds are as Rs. 4500, 6000, 5500, 3750 and 4700.

The arithmatic mean of income is Rs. 4700. The amount of variation in income is shown by deviations from the central values. In this case the deviation from the arithmean are Rs. 390, 1110, 610, 1140 and 190.

Some More Questions From Measures of Dispersion Chapter

In the previous question, calculate the relative measures of variation and indicate the value, which in your opinion is more reliable.

If in the previous question, each worker is given a hike of 10% in wages, how are the mean and standard deviation values affected?

The sum of 10 values is 100 and the sum of their squares is 1090. Find the coefficient of variation.

Calculate the mean deviation about mean and standard deviation for the following distribution:

Classes

Frequencies

20–40

3

40–80

6

80–100

20

100–120

12

120–140

9

50

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Measures Of Dispersion

Illustrate the meaning of the term dispersion with examples.

Some More Questions From Measures of Dispersion Chapter

In the previous question, calculate the relative measures of variation and indicate the value, which in your opinion is more reliable.

If in the previous question, each worker is given a hike of 10% in wages, how are the mean and standard deviation values affected?

The sum of 10 values is 100 and the sum of their squares is 1090. Find the coefficient of variation.

Calculate the mean deviation about mean and standard deviation for the following distribution:

Classes

Frequencies

20–40

3

40–80

6

80–100

20

100–120

12

120–140

9

50

A measure of dispersion is a good .supplement to the central value in understanding a frequency distribution. Comment

Define dispersion.

How many methods are there to calculate dipersion?

Define range.

Define quartile deviation.

How is coefficient of quartile deviation calculated?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Phone Number

Email Address

Loaction

Classes	Frequencies
20–40	3
40–80	6
80–100	20
100–120	12
120–140	9
	50

For Daily Free Study Material Join wiredfaculty

Measures Of Dispersion

Illustrate the meaning of the term dispersion with examples.

Some More Questions From Measures of Dispersion Chapter

In the previous question, calculate the relative measures of variation and indicate the value, which in your opinion is more reliable.

If in the previous question, each worker is given a hike of 10% in wages, how are the mean and standard deviation values affected?

The sum of 10 values is 100 and the sum of their squares is 1090. Find the coefficient of variation.

Calculate the mean deviation about mean and standard deviation for the following distribution: Classes Frequencies 20–40 3 40–80 6 80–100 20 100–120 12 120–140 9 50

A measure of dispersion is a good .supplement to the central value in understanding a frequency distribution. Comment

Define dispersion.

How many methods are there to calculate dipersion?

Define range.

Define quartile deviation.

How is coefficient of quartile deviation calculated?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Calculate the mean deviation about mean and standard deviation for the following distribution:

Classes

Frequencies

20–40

3

40–80

6

80–100

20

100–120

12

120–140

9

50