T.R. Jain and V.K. Ohri Solutions for Class 11 Statistics for Economics Chapter 4 - Organisation of Data

T.R. Jain and V.K. Ohri Solutions for Class 11 Statistics for Economics Chapter 4 – Organisation of Data 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 4
Chapter Name Organisation of Data
Number of questions solved 05
Category T.R. Jain and V.K. Ohri

Chapter 4 – Organisation of Data covers the below-mentioned concepts:

  • What is the classification?
  • Concept of variable
  • Conversion of raw data into statistical series
  • Types of frequency distribution

T.R. Jain and V.K. Ohri Solutions for Class 11 Statistics for Economics Chapter 4 – Organisation of Data

Question 1

Convert the following cumulative frequency series into a simple frequency series:

  • 4 students obtained less than 10 marks
  • 20 students obtained less than 20 marks
  • 40 students obtained less than 30 marks
  • 48 students obtained less than 40 marks
  • 50 students obtained less than 50 marks

Solution:

Conversion of Cumulative Frequency Series into a Simple Frequency Series

Cumulative Frequency Series Simple Frequency Series
Marks less than Number of students Marks Number of students
10 4 0-10 4
20 20 10-20 20-4 = 16
30 40 20-30 40-20 = 20
40 48 30-40 48-40 = 8
50 50 40-50 50-48 = 2

Question 2

In a survey, it was found that 50 families bought milk in the following quantities in a particular month. Classify the following data in an individual, discrete, continuous and cumulative frequency series.

19 25 12 21 20
11 7 9 11 14
20 15 22 15 17
10 23 18 11 19
25 22 5 18 17
11 6 21 24 26
8 5 9 20 23
16 22 22 23 13
16 11 16 22 17
23 22 10 7 21

Solution:

1. Individual series: In the ascending order of the items

5 11 16 20 22
5 11 16 20 22
6 11 16 20 23
7 11 17 21 23
7 11 17 21 23
8 12 17 21 23
9 13 18 22 24
9 14 18 22 25
10 15 19 22 25
10 15 19 22 26

2. Discrete Series: In the ascending order of the items

Quantity of Milk Tally Bars Frequency Quantity of Milk Tally Bars Frequency
5 II
6 I
7 II
8
9
10
11
12
13
14
15

Also Check: What is Classification of data?

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