Differentiate between correlation and causation.

3

(a)

What do you mean by positive and negative correlation?

3

(a)

What do you mean by linear and non linear correlation?

3

(a)

What is the difference between simple, partial and multiple correlation?

3

(a)

Mention the mathematical properties of correlation.

3

(a)

Does zero correlation mean independence? 

3

(a)

What is a scatter diagram? Draw scatter diagram for perfect positive correlation.

3

(a)

Mention different methods of finding correlation

3

(a)

What are assumptions taken by Karl Pearson's while developing his coefficient of correlation?

3

(a)

Discuss importance and utility of correlation.

3

(a)

What is spurious correlation? Give some examples.

3

(a)

If scatter diagram is a straight line parallel to X axis or Y axis, what kind of correlation exist between X and Y?

3

(a)

If scatter diagram is a straight line upward sloping to the right, what kind of correlation exist between X and Y?

3

(a)

What are the merits and limitations of Spearman's rank correlation?

3

(a)

What is Probable error? What is its utility?

3

(a)