Chapter 11 – Measures of Dispersion is an essential concept that students should study extensively, according to T.R. Jain and V.K. Ohri Solutions for Class 11 Statistics for Economics. T.R. Jain and V.K. Ohri Solutions for Class 11 are available here.
| Board | CBSE |
| Class | Class 11 |
| Subject | Statistics for economics |
| Chapter | Chapter 11 |
| Chapter Name | Measures of dispersion |
| Number of questions solved | 03 |
| Category | T.R. Jain and V.K. Ohri |
T.R. Jain and V.K. Ohri Solutions for Class 11 Statistics for Economics Chapter 11 – Measures of Dispersion
Question 1
Find the interquartile range, quartile deviation and coefficient of quartile deviation from the following data:
| Marks | 28 | 18 | 20 | 24 | 27 | 30 | 15 |
Solution:
Firstly, arrange the data in the ascending order:
| S.No. | Marks |
| 1 | 15 |
| 2 | 18 |
| 3 | 20 |
| 4 | 24 |
| 5 | 27 |
| 6 | 28 |
| 7 | 30 |
| N = 7 |
Question 2
What are the methods of Standard Deviation?
Solution:
The two standard methods of deviation are:
- Direct method
- Short-cut method
Question 3
Define Dispersion.
Solution:
Dispersion is the measure of the extent to which the different items tend to disperse away from the central tendency.
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