Deck 2: Correlation and Regression Analysis

Question 1

Coefficient of correlation explains .................... of the relationship between two variables.

A)Degree
B)Direction
C)Both of the above
D)None of the above

Answer 1

Both of the above

Question 2

For perfect correlation, the coefficient of correlation should be ..........................

A)± 1
B)+ 1
C)- 1
D)0

Answer 2

± 1

Question 3

The rank correlation coefficient is always............................

A)+ 1
B)- 1
C)0
D)Between + 1 and - 1

Answer 3

Between + 1 and - 1

Question 4

Spearman's Rank Correlation Coefficient is usually denoted by....................

A)K
B)r
C)S
D)R

Question 5

Probable error is used to:

A)Test the reliability of correlation coefficient
B)Measure the error in correlation coefficient
C)Both a an b
D)None of these

Question 6

If coefficient of correlation is more than ................of its P E, correlation is significant.

A)2 times
B)5 times
C)6 times
D)10 times

Question 7

In correlation analysis, Probable Error = ........................ x 0.6745

A)Standard deviation
B)Standard error
C)Coefficient of correlation
D)None of these

Question 8

Coefficient of concurrent deviation depends on .......................

A)The signs of the deviations
B)The magnitude of the deviations
C)Bothe a and b
D)None of these

Question 9

Correlation analysis between two sets of data only is called....................

A)Partial correlation
B)Multiple correlation
C)Nonsense correlation
D)Simple correlation

Question 10

Correlation analysis between one dependent variable with one independent variable by keeping the other independent variables as constant is called......................

A)Partial correlation
B)Multiple correlation
C)Nonsense correlation
D)Simple correlation

Question 11

Study of correlation among three or more variables simultaneously is called.............

A)Partial correlation
B)Multiple correlation
C)Nonsense correlation
D)Simple correlation

Question 12

If r = 0.8, coefficient of determination is.....................................

A)80%
B)8%
C)64%
D)0.8%

Question 13

The term regression was first used by..........................

A)Karl Pearson
B)Spearman
C)R A Fisher
D)Francis Galton

Question 14

....................refers to analysis of average relationship between two variables to provide mechanism for prediction.

A)Correlation
B)Regression
C)Standard error
D)None of these

Question 15

If there are two variables, there can be at most ........................ number of regression lines.

A)One
B)Two
C)Three
D)Infinite

Question 16

Regression line is also called.................................

A)Estimating equation
B)Prediction equation
C)Line of average relationship
D)All the above

Question 17

The point of intersection of two regression lines is..........................

A)(0,0)
B)(1,1)
C)(x,y)
D)(x? , ?)