Скачать или смотреть Secondary Data Sources and Problems | Coefficient of Quartile Deviation | NEB Question Solved

Welcome to Everest Online Academy! In this video, we explain "Secondary Data Sources and Problems" and solve numerical problems on the Coefficient of Quartile Deviation, essential topics in the Class 12 Statistics syllabus under the NEB curriculum. Understanding these concepts is crucial not only for scoring well in exams but also for building a strong foundation in statistics. Whether you're struggling with definitions, identifying key points, or solving numerical problems, this video will guide you step-by-step with clear explanations in Nepali, solved examples, and exam-oriented tips.

✅ What You’ll Learn in This Video:

Introduction to Secondary Data:
What is Secondary Data?
Definition: Data collected by someone else for a different purpose and used for analysis.
Explanation in Nepali:
दोस्रो पक्षले कुनै अर्को उद्देश्यका लागि संग्रह गरेको र हामीले विश्लेषणका लागि प्रयोग गर्ने डाटालाई गौण डाटा भनिन्छ।
Examples of Secondary Data:
Census reports, government publications, research papers, etc.
Explanation in Nepali:
जनगणना प्रतिवेदन, सरकारी प्रकाशनहरू, शोध पत्रहरू आदि।
Sources of Secondary Data:
Published Sources:
Books, journals, newspapers, government reports.
Explanation in Nepali:
पुस्तकहरू, पत्रिकाहरू, समाचारपत्रहरू, सरकारी प्रतिवेदनहरू।
Unpublished Sources:
Internal records of organizations, unpublished research studies.
Explanation in Nepali:
संस्थाहरूका आन्तरिक रेकर्डहरू, प्रकाशित नगरेका शोध अध्ययनहरू।
Problems with Secondary Data:
Accuracy: Data may not be accurate or up-to-date.
Explanation in Nepali:
डाटा सटीक वा अपडेट नहुन सक्छ।
Relevance: Data may not align with the current study's objectives.
Explanation in Nepali:
डाटा हालको अध्ययनका उद्देश्यसँग मिल्दैन।
Bias: Data may reflect the bias of the original collector.
Explanation in Nepali:
डाटामा मूल संग्रहकर्ताको पक्षपात प्रतिबिम्बित हुन सक्छ।
Coefficient of Quartile Deviation:
Formula:


Step-by-Step Solutions to Exam Questions:
Example 1: Secondary Data Sources
Question: List two sources of secondary data.
Solution:
Government publications.
Research papers.
Example 2: Problems with Secondary Data
Question: Mention two problems associated with secondary data.
Solution:
Lack of accuracy.
Irrelevance to current objectives.
Example 3: Coefficient of Quartile Deviation

Exam-Oriented Tips:
Memorize the formula for the coefficient of quartile deviation.
Practice solving numerical problems systematically.
Highlight key points about secondary data sources and their limitations.
Use real-life examples to explain concepts like bias and relevance.
Common Mistakes to Avoid While Solving Problems:

​
while calculating the coefficient.
Ignoring units or misinterpreting given data.
Forgetting to simplify fractions in the final answer.
Tips to Score Full Marks in Statistics Questions:
Solve previous years' numerical and theoretical questions systematically.
Create a personal list of frequently tested formulas and their applications.
Practice using diagrams or tables to organize your thoughts.
💡 Why Watch This Video?
The "Secondary Data Sources and Problems" and "Coefficient of Quartile Deviation" chapters are frequently tested topics in NEB Statistics exams, especially in the context of theoretical and numerical questions. By mastering these concepts, you can confidently tackle exam questions and secure full marks in this section. This video simplifies the process, provides step-by-step solutions to past year questions, and includes practical tips to ensure you’re fully prepared.

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