Deck 9: Correlation Coefficient, Index Numbers, and Time Series

Question 1

The Correlation coefficient between two variables is the………………..of their regression coefficients.

A)Arithmetic mean
B)Geometric mean
C)Harmonic mean
D)None of these

Answer 1

Geometric mean

Question 2

The percent of the total variation of the dependent variable Y explained by the set of independent variables X is measured by:

A)Coefficient of Correlation
B)Coefficient of Skewness
C)Coefficient of Determination
D)Standard error

Answer 2

Coefficient of Determination

Question 3

A Scatter diagram is considered for measuring

A)Linear relationship between two variables
B)Curvilinear relationship between two variables
C)Neither a or b
D)Both a and b

Answer 3

Both a and b

Question 4

The maximum value of the Rank Correlation coefficient is

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

Question 5

What is the purpose of a simple linear regression?

A)To predict scores on a dependent variable from scores on a single independent variable
B)To predict scores on an independent variable from scores on multiple dependent variables
C)To predict scores on a dependent variable from scores on multiple independent variables
D)None of Above

Question 6

If r is the simple correlation coefficient, the quantity r2 is known as ...................

A)Coefficient of determination
B)Coefficient of non-determination
C)Coefficient of alienation
D)None of these

Question 7

Asimpleindexnumberis anumberthatmeasures arelativechangein ?

A)group of variable with respect to a base
B)single variable with respect to a base
C)Both A &B
D)None of theabove

Question 8

Which index number is called as ideal index number.

A)Lasperys
B)Paasches
C)Fisher
D)None of Above

Question 9

Secular trend can be measured by:

A)Two methods
B)Three methods
C)Four methods
D)Five methods

Question 10

Fishers price index number is the -------

A)A.M. of Lasperys and Paasches.
B)G.M. of Lasperys and Paasches.
C)Difference between Lasperys and Paasches
D)None of the above.

Question 11

Relative Method is further divided into how many types?

A)One
B)two
C)None of the above
D)All of the Above.

Question 12

In Price Index Numbers prices can either be ?

A)Retail
B)wholesale
C)Both I and II
D)None of the above.

Question 13

While computing a weighted index, the current period quantities are used in the:

A)Laspeyre's method
B)Paasche's method
C)Marshall Edgeworth method
D)Fisher's ideal method

Question 14

………….is a point of reference in comparing various data describing individual behaviour.

A)Sample
B)Base period
C)Estimation
D)None

Question 15

Wheat crops badly damaged on account of rains is:

A)Cyclical movement
B)Random movement
C)Secular trend
D)Seasonal movement

Question 16

A complete business cycle consists of a period of:

A)Prosperity
B)Recession
C)Both prosperity and recession
D)none of the above

Question 17

Which of the following can't be a component for a time series plot?

A)Seasonality
B)Trend
C)Cyclical
D)Noise
E)None of the above

Question 18

The additive and multiplicative time series models are:

A)Y = T + S + C + I and Y = TSCI respectively
B)Y = TSCI and Y = T + S + C + I
C)none of these
D)all

Question 19

Value of b in the trend line Y = a + bX is:

A)Always positive
B)Always negative
C)Both positive or negative
D)None of these

Question 20

In a straight line equation Y = a + bX; a and b are respectively:

A)X-intercept and slope
B)Y intercept and slope
C)can't determined
D)all

Question 21

A time series consists of:

A)Short-term variations
B)Irregular variations
C)Long-term variations
D)All of the above