Deck 8: Probability, Correlation, and Index Numbers in Statistics

Question 1

Coefficient of correlation will be always

A)More than 0
B)More than -1
C)Less than -1
D)Between -1 and +1

Answer 1

Between -1 and +1

Question 2

We can measure the cause and effect relationship by the help of

A)Time series analysis
B)Cross-sectional analysis
C)Correlation analysis
D)Regression analysis

Answer 2

Regression analysis

Question 3

The total events to throw three dice simultaneously is

A)6
B)18
C)21
D)216

Answer 3

216

Question 4

When the two regression lines are parallel to each other, then their slopes are

A)Zero
B)Different
C)Same
D)Positive

Question 5

In scatter diagram, if most of the points lie in the first and third quadrants, then coefficient of correlation is:

A)Negative
B)Positive
C)Zero
D)All the above

Question 6

Correlation does not imply

A)negative correlation
B)cause-effect relationship
C)relativity
D)correction relationship

Question 7

If both the variables are varying in the same direction, the correlation is said to be

A)Positive correlation
B)Negative correlation
C)Partial correlation
D)None of the above

Question 8

When two events cannot occur simultaneously in a single trial it is called

A)Mutually exclusive events
B)Collectively exclusive events
C)Mutually exhaustive events
D)None of the above

Question 9

When the outcome of one event does not affect the outcome of the other it is said to be

A)Dependent event
B)Independent event
C)Mutually exclusive event
D)Equally likely events

Question 10

Regression coefficient is independent of

A)Origin
B)Scale
C)Both origin and scale
D)None of the above

Question 11

The slope of regression line of Y on X is also called the

A)Correlation coefficient of Y on X
B)Correlation coefficient of X on Y
C)Regression coefficient of X on Y
D)Regression coefficient of Y on X

Question 12

Two events that cannot be happened simultaneously is known as:

A)Exhaustive events
B)Independent events
C)Mutually exclusive events
D)none of the above

Question 13

If two events A and B are mutually exclusive the probability of the occurrence of either A or B is the sum individual probability of A and B. This theorem is called:

A)Multiplication theorem
B)Addition theorem
C)Classical probability
D)Subtraction theorem

Question 14

One card is drawn from a standard pack of 52. What is the probability that the card drawn is a king?

A)4/52
B)1/4
C)1/52
D)52/4

Question 15

A dice is thrown. Find the probability of getting an even number?

A)2/6
B)3/6
C)4/6
D)5/6

Question 16

If both variables are varying in the opposite direction, it is called:

A)Partial correlation
B)Positive correlation
C)High degree of correlation
D)Negative correlation

Question 17

In perfect positive correlation:

A)r = 0
B)r = -1
C)r = +1
D)r = +/- 1

Question 18

The total current year prices for the various commodities in question is divided by the total of base year prices and the quotient is multiplied under

A)simple aggregative method
B)simple average of relative method
C)weighted aggregative method
D)Laspeyres' methos

Question 19

A component of time series used for short term forecast is

A)trend
B)seasonal
C)cyclical
D)irregular