Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

The total events to throw three dice simultaneously is

Accepted Answer

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

Question 4

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

Accepted Answer

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

Question 5

Regression coefficient is independent of

Accepted Answer

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

Question 6

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

Accepted Answer

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 7

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

Accepted Answer

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

Question 8

A component of time series used for short term forecast is

Accepted Answer

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

Question 9

In perfect positive correlation:

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

Correlation does not imply

Accepted Answer

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

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

Two events that cannot be happened simultaneously is known as:

Accepted Answer

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

Question 17

Coefficient of correlation will be always

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

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:

Accepted Answer

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

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