The uploaded PDF contains the complete solution set for the worksheet based on Chapter 3, Organisation of Data, from Class 11 Economics. This solutions document provides correct answers along with explanations for multiple-choice questions, assertion–reason questions, short answers, and long descriptive questions. It explains in detail how raw data is classified, organised, and converted into meaningful information that can be used for further statistical analysis.
I am writing about this solutions PDF because Chapter 3 is a foundation chapter in statistics. Many students understand what data is, but they struggle with how to organise it properly. A reliable solution guide helps students verify their answers, understand concepts clearly, and learn how to write well-structured exam answers.
As shown in the uploaded solutions PDF CH-3 Organisation of data WS 1 …, the answers are arranged section-wise and follow the same pattern as the worksheet, which makes revision easy and systematic.
Solutions to Multiple-Choice Questions
The PDF provides correct options with explanations for each MCQ.
Some important clarifications include:
• Ability to play a specific game is an example of qualitative classification
• Classification is the first step before tabulation
• Chronological classification is used when data is arranged according to time
• Quantitative classification deals with numerical data
• Class mid-points represent the central value of each class
These explanations strengthen understanding of basic concepts.
Meaning of Organisation of Data
The solutions define organisation of data as the systematic arrangement of collected figures so that data becomes easy to understand and convenient for further statistical treatment.
Key points explained:
• Raw data is unorganised and difficult to interpret
• Organised data is concise and meaningful
• Organisation helps in comparison and analysis
This concept forms the base of the chapter.
Classification of Data
Classification is explained as grouping data according to common characteristics.
Important ideas include:
• Similar items are placed in one group
• Data is divided into homogeneous classes
• Classification removes unnecessary details
• Classification makes complex data simple
These ideas appear in assertion–reason questions.
Download this CH-3 Organisation of data WS 1 SOL PDF File: Click Here
Types of Classification
The solutions describe four main types of classification.
Qualitative Classification
Based on qualities or attributes that cannot be measured numerically.
Examples:
• Gender
• Literacy
• Honesty
Quantitative Classification
Based on characteristics that can be measured numerically.
Examples:
• Height
• Weight
• Income
• Marks
Chronological Classification
Based on time.
Examples:
• Population in different years
• Sales over different months
Spatial (Geographical) Classification
Based on place.
Examples:
• State-wise production
• City-wise population
These types are frequently tested.
Simple and Manifold Classification
The PDF explains:
• Simple (dichotomous) classification divides data into two classes
• Manifold classification divides data on the basis of more than one attribute
Examples of population classified by gender and employment status are provided.
Statistical Series
The solutions explain that a statistical series is an arrangement of data in a particular order.
Main types:
• Individual series
• Discrete (frequency array) series
• Continuous (frequency distribution) series
Tables in the PDF show examples of each.
Characteristics of a Good Classification
According to the PDF:
• Classes should be clear
• No overlapping should exist
• Classification should be flexible
• Data in each class should be homogeneous
• Classification should suit the objective
These points are important for long answers.
Loss of Information in Classified Data
The PDF explains that when raw data is grouped into classes, exact values are not shown.
For example, in a class interval of 0–10, all values between 0 and 9 are treated together. This leads to loss of detailed information, although data becomes easier to handle.
Why This Solutions PDF Is Useful
From my experience, this solutions PDF is very helpful because:
• It explains answers clearly
• It improves conceptual understanding
• It saves revision time
• It helps in writing proper exam answers
Students who study these solutions carefully perform better.
