# NCERT Class 11 Statistics for Economics Chapter 2 Notes & Mind Map

Welcome to the ultimate guide on 'Collection of Data' for Class 11th students at WitKnowLearn! Our comprehensive Class 11 Statistics Chapter 2 Notes are tailored to provide you with an in-depth understanding of data collection techniques and concepts. Whether you're studying for your exams or just looking to deepen your knowledge in economics, these notes are your perfect resource.

Delving into Chapter 2 of Class 11 Economics, we explore the intricacies of data collection. Our notes not only cover the theoretical aspects but also provide practical insights, making the learning process both engaging and effective. With our Collection of Data Class 11 Notes, you'll grasp the foundational principles and methods used in gathering accurate and relevant data, an essential skill in the field of economics.

To further enhance your learning experience, we offer a unique Collection of Data Class 11 Mind Map. This visual tool aids in simplifying complex topics, allowing you to connect various concepts in a clear and concise manner. It's an excellent resource for quick revisions and for reinforcing what you've learned.

Additionally, we provide a set of Collection of Data Class 11 Extra Questions and Answers, designed to challenge your understanding and prepare you thoroughly for your exams. These questions cover a wide range of topics, ensuring that you are well-prepared for any exam question.

Whether you're a student looking to excel in Class 11 Economics or a curious learner eager to understand the fundamentals of data collection, our notes on Chapter 2 Statistics Class 11 are here to guide you. Dive into our resources and master the art of data collection with WitKnowLearn!

Chapter 2 - Collection Of Data

﻿In the world of research, data collection is a cornerstone. It involves gathering, measuring, and analyzing insights accurately, using standardized, validated methods. For researchers, data collection is not just a step but the foundation upon which hypotheses are evaluated and conclusions are drawn. This process varies across different fields, tailored to the specific information needs of each study.

In statistical research, data is indispensable, serving as the key tool for reaching sound conclusions. The initial phase in any statistical investigation, data collection, sets the stage for the entire research process.

Sources of Data:

Data sources are broadly categorized into primary and secondary sources. Primary sources include data collected firsthand during the research process. This original data is gathered directly from its source. The methods for collecting primary data include personal interviews, mailing surveys, telephone interviews, indirect verbal investigation, information from local sources, and the enumerator method.

Secondary data, on the other hand, is previously collected and processed data by an external agency. It's often extracted from large-scale institutional records, like those from government bodies or healthcare facilities.

Primary vs. Secondary Data:

The comparison between primary and secondary data hinges on aspects like accuracy, originality, cost, and the need for modification. Primary data, being firsthand, is typically more accurate and specific to the researcher's needs but is also more time-consuming and expensive to collect. Secondary data is quicker and more economical to acquire but may lack specific relevance and accuracy.

Published and Unpublished Sources:

Secondary data can be sourced from published materials like government and semi-government publications, committee reports, journals, newspapers, and international publications. However, not all valuable data is published. Unpublished sources, including private firm records and research findings, often contain valuable statistical material.

The Role of Pilot Surveys:

Before finalizing a data collection method, a pilot survey is essential. This preliminary testing helps identify and rectify any shortcomings in the questionnaire or data collection technique, ensuring the effectiveness of the research process.

Through this comprehensive guide, Class 11 students will gain a deeper understanding of the diverse methods and critical importance of data collection in research, setting a strong foundation for their future academic endeavors.

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