Deck 1: Correlation Analysis and Coefficient of Correlation

Question 1

The techniques which provide the decision maker a systematic and powerful means of analysis to explore policies for achieving predetermined goals are called..........................

A)Correlation techniques
B)Mathematical techniques
C)Quantitative techniques
D)None of the above

Answer 1

Quantitative techniques

Question 2

If change in one variable results a corresponding change in the other variable, then the variables are.........................

A)Correlated
B)Not correlated
C)Any of the above
D)None of the above

Answer 2

Correlated

Question 3

When the values of two variables move in the same direction, correlation is said to be ............................

A)Linear
B)Non-linear
C)Positive
D)Negative

Answer 3

Positive

Question 4

When the values of two variables move in the opposite directions, correlation is said to be ............................

A)Linear
B)Non-linear
C)Positive
D)Negative

Question 5

When the amount of change in one variable leads to a constant ratio of change in the other variable, then correlation is said to be .........................

A)Linear
B)Non-linear
C)Positive
D)Negative

Question 6

...........................attempts to determine the degree of relationship between variables.

A)Regression analysis
B)Correlation analysis
C)Inferential analysis
D)None of these

Question 7

Non-linear correlation is also called.....................................

A)Non-curvy linear correlation
B)Curvy linear correlation
C)Zero correlation
D)None of these

Question 8

Scatter diagram is also called ......................

A)Dot chart
B)Correlation graph
C)Both a and b
D)None of these

Question 9

Numerical measure of correlation is called .....................

A)Coefficient of correlation
B)Coefficient of determination
C)Coefficient of non-determination
D)Coefficient of regression

Question 10

Coefficient of correlation explains:

A)Concentration
B)Relation
C)Dispersion
D)Asymmetry

Question 11

A high degree of +ve correlation between availability of rainfall and weight of weight of people is:

A)A meaningless correlation
B)A spurious correlation
C)A nonsense correlation
D)All of the above

Question 12

If the ratio of change in one variable is equal to the ratio of change in the other variable, then the correlation is said to be .....................

A)Linear
B)Non-linear
C)Curvilinear
D)None of these

Question 13

Pearsonian correlation coefficient if denoted by the symbol ...............

A)K
B)r
C)R
D)None of these

Question 14

If r= +1, the correlation is said to be ...................

A)High degree of +ve correlation
B)High degree of -ve correlation
C)Perfect +ve correlation
D)Perfect -ve correlation

Question 15

If the dots in a scatter diagram fall on a narrow band, it indicates a ....................... degree of correlation.

A)Zero
B)High
C)Low
D)None of these

Question 16

If all the points of a dot chart lie on a straight line vertical to the X-axis, then coefficient of correlation is ...................

A)0
B)+1
C)-1
D)None of these

Question 17

If all the points of a dot chart lie on a straight line parallel to the X-axis, it denotes .................................of correlation.

A)High degree
B)Low degree
C)Moderate degree
D)Absence

Question 18

If dots are lying on a scatter diagram in a haphazard manner, then r = ......................

A)0
B)+1
C)-1
D)None of these

Question 19

The unit of Coefficient of correlation is ........................

A)Percentage
B)Ratio
C)Same unit of the data
D)No unit

Question 20

Product moment correlation method is also called ........................

A)Rank correlation
B)Pearsonian correlation
C)Concurrent deviation
D)None of these

Question 21

The -ve sign of correlation coefficient between X and Y indicates.............................

A)X decreasing, Y increasing
B)X increasing, Y decreasing
C)Any of the above
D)There is no change in X and Y