# NCERT solutions for Economics - Statistics for Economics Class 11 chapter 7 - Correlation [Latest edition]

#### Chapters ## Chapter 7: Correlation

Exercise
Exercise [Pages 105 - 106]

### NCERT solutions for Economics - Statistics for Economics Class 11 Chapter 7 CorrelationExercise [Pages 105 - 106]

Exercise | Q 1. | Page 105

The unit of the correlation coefficient between height in feet and weight in kgs is ______

• kg/feet

• percentage

• non-existent

Exercise | Q 2. | Page 105

The range of simple correlation coefficient is ______

• 0 to infinity

• minus one to plus one

• minus infinity to infinity

Exercise | Q 3. | Page 105

If rxy is positive the relation between X and Y is of the type ______

• When Y increases X increases

• When Y decreases X increases

• When Y increases X does not change

Exercise | Q 4. | Page 105

If rxy = 0 the variable X and Y are ______

• linearly related

• not linearly related

• independent

Exercise | Q 5. | Page 105

Of the following three measures which can measure any type of relationship.

• Karl Pearson’s coefficient of correlation

• Spearman’s rank correlation

• Scatter diagram

Exercise | Q 6. | Page 105

If precisely measured data are available the simple correlation coefficient is ______

• more accurate than the rank correlation coefficient

• less accurate than the rank correlation coefficient

• as accurate as the rank correlation coefficient

Exercise | Q 7. | Page 105

Why is r preferred to covariance as a measure of association?

Exercise | Q 8. | Page 105

Can r lie outside the –1 and 1 range depending on the type of data?

Exercise | Q 9. | Page 105

Does correlation imply causation?

Exercise | Q 10. | Page 105

When is rank correlation more precise than simple correlation coefficient?

Exercise | Q 11. | Page 105

Does zero correlation mean independence?

Exercise | Q 12. | Page 105

Can a simple correlation coefficient measure any type of relationship?

Exercise | Q 13. | Page 105

Collect the price of five vegetables from your local market every day for a week. Calculate their correlation coefficients. Interpret the result.

Exercise | Q 14. | Page 105

Measure the height of your classmates. Ask them the height of their benchmate. Calculate the correlation coefficient of these two variables. Interpret the result.

Exercise | Q 15. | Page 106

List some variables where accurate measurement is difficult.

Exercise | Q 16. | Page 106

Interpret the values of r as 1, –1, and 0.

Exercise | Q 17. | Page 106

Why does the rank correlation coefficient differ from the Pearsonian correlation coefficient?

Exercise | Q 18. | Page 106

Calculate the correlation coefficient between the heights of fathers in inches (X) and their sons (Y)

 X 65 66 57 67 68 69 70 72 Y 67 56 65 68 72 72 69 71
Exercise | Q 19. | Page 106

Calculate the correlation coefficient between X and Y and comment on their relationship:

 X -3 -2 -1 1 2 3 Y 9 4 1 1 4 9
Exercise | Q 20. | Page 106

Calculate the correlation coefficient between X and Y and comment on their relationship.

 X 1 3 4 5 7 8 Y 2 6 8 10 14 16

## Chapter 7: Correlation

Exercise ## NCERT solutions for Economics - Statistics for Economics Class 11 chapter 7 - Correlation

NCERT solutions for Economics - Statistics for Economics Class 11 chapter 7 (Correlation) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Economics - Statistics for Economics Class 11 solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Economics - Statistics for Economics Class 11 chapter 7 Correlation are Lorenz Curve, Measures of Central Tendency - Mean, Measures of Central Tendency - Median, Measures of Central Tendency - Mode, Measures of Central Tendency - Central Value Or Representative Value, Measures of Central Tendency - Series, Measures of Central Tendency - Partition Value, Measures of Central Tendency - Quartile, Measures of Central Tendency - Deciles, Measures of Central Tendency - Percentile, Measures of Dispersion - Absolute Dispersion, Measures of Dispersion - Relative Dispersion, Lorenz Curve, Correlation Meaning, Properties of Correlation,, Types of Correlation, Scatter Diagram of Correlation, Measures of Correlation - Karl Pearson'S Method (Two Variables Ungrouped Data), Measures of Correlation - Spearman's Rank Correlation, Meaning of Index Numbers, Uses of Index Numbers, Types of Index Number - Wholesale Price Index, Types of Index Number - Consumer Price Index, Types of Index Number - Index of Industrial Production, Construction of Price Index, Cost of Living Index Number, Inflation and Index Numbers, Method to Measure - Simple Aggregate Method, Method to Measure - Simple Average Price Relative Method, Method to Measure - Laspeyer Method, Method to Measure - Paasche's Index Numer, Method to Measure - Fisher's Method, Correlation Meaning, Types of Relationship, Techniques for Measuring Correlation, Correlation - Conclusion.

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