Class 11 Economics Important Chapter 20 Correlation

Class 11 Economics Important Chapter 20 Correlation Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 11 Economics Important Solutions and select need one. AHSEC Class 11 Economics Additional Notes English Medium Download PDF. HS 1st Year Economics Important Solutions in English.

Class 11 Economics Important Chapter 20 Correlation

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam AHSEC Board Class 11 Economics Additional Question Answer are part of All Subject Solutions. Here we have given HS 1st Year Economics Important Notes in English for All Chapters, You can practice these here.

Correlation

Chapter: 20

PART – B : STATISTICS FOR ECONOMICS

IMPORTANT QUESTION AND ANSWER

Short Type Questions and Answers:

1. Who developed the Rank Correlation method?

Ans: Charles Edward Spearman.

2. In which year was the Rank Correlation method developed?

Ans: 1904.

3. What is another name for Spearman’s Rank Correlation method?

Ans: Rank difference method.

4. Why is Spearman’s method useful when measurements are not possible?

Ans: Because it is based on ranking rather than exact measurements.

5. Give two examples of factors where rank correlation is useful.

Ans: Intelligence and beauty.

6. What is the rank given to the highest value in the series?

Ans: Rank 1.

7. How is the second-best value ranked in rank correlation?

Ans: Rank 2.

8. What does “D” represent in the rank correlation formula?

Ans: The difference between the ranks of two variables.

9. How is D²obtained in rank correlation calculation?

Ans: By squaring the difference between ranks.

10. What adjustment is needed if two or more items have the same rank?

Ans:If two or more items have the same rank, they are each assigned the average of the ranks they would occupy, and in Spearman’s rank correlation, a tie correction factor m(m²  – 1)/12 is applied, where mmm is the number of tied items.  

11. What does “m” represent in the adjustment formula for equal ranks?

Ans: The number of items having the same rank.

12. What does “N” stand for in the rank correlation formula?

Ans: The number of pairs of observations.

13. If three individuals are tied at rank 5, what average rank is given?

Ans: 5+6+73=6\frac{5 + 6 + 7}{3} = 635+6+7​=6.

14. What type of correlation does Spearman’s method measure?

Ans: The degree of association between ranked variables.

15. Why is rank correlation preferred when dealing with subjective factors?

Ans: Because it avoids inaccuracies from unreliable quantitative measurements.