T.R. Jain and V.K. Ohri Solutions for Class 11 Statistics for Economics Chapter 11 – Measures of Dispersion is regarded as an important concept to be studied thoroughly by the students. Here, we have provided T.R. Jain and V.K. Ohri Solutions for Class 11.
| 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 |
Chapter 11 – Measures of Dispersion covers the following concepts:
- Concept and measures of dispersion
- Methods of measuring dispersion
- Mean deviation
- Standard deviation
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 |
Q1 =
= Size of 2nd item = 18 marks
Q3 =
= Size of 6th item = 28 marks
Interquartile range = Q3 – Q1 = 28-18 = 10
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.
The provided solutions are considered to be the best for statistics for economics of class 11. Stay tuned to BYJU’S to learn more and score well in the upcoming board examinations.
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