Classical

Statistics and methodology - Statistics and Methodology Multiple Choice Questions

6:  

Which of the following statement is/are correct?

A.

A system is defined and determined by its boundaries and objectives

B.

If a system is functioning in isolation from the environment, then the system does not have any exchange with the environment nor is it influenced by the environmental changes

C.

The information system is a combination of a person, the hardware and the software

D.

All of the above

 
 

Option: D

Explanation :


7:  

Match the following

List-I (Phases of decision making process)

(A) Intelligence

(B) Design

(C) Choice

List-II (Explanation)

1. Inventing, developing, and analyzing possible courses of action. This involves processes to understand the problem, to generate solutions, and to test solutions for feasibility.

2. Selecting an alternative or course of action from those available. A choice is made and implemented.

3. Searching the environment for conditions calling for decisions. Data inputs are obtained, processed, and examined for clues that may identify problems or opportunities.

A.

(A) (B) (C)

1    2    3

B.

(A) (B) (C)

3    1    2

C.

(A) (B) (C)

2    3    1

D.

(A) (B) (C)

1    3    2

 
 

Option: B

Explanation :


8:  

If r12 = 0.9, r13 = 0.75, r23 = 0.7, find r1.23

A.

0.39

B.

0.916

C.

0.316

D.

0.36

 
 

Option: B

Explanation :

Hence the answer is (b)


9:  

160 heads and 240 tails resulted from 400 tosses of a coin. Find a 95% confidence interval for the probability of a head. Does this appear to be a fair coin?

A.

Cannot be said to be fair

B.

Can be or cannot be said to be fair

C.

Can be said to be fair

D.

Yes with +1

 
 

Option: A

Explanation :

Chance of getting head

1 or      p = 1/2

Expected frequency = np

= 400 x 1/2 = 200

Standard error = √npq

= √1/2 x 1/2 x 400

= 10

Actual difference = 200 - 160

= 40.

This difference is greater than three times of the standard error. Hence the coin cannot be said to fair.

Hence the answer is (a).


10:  

Yaties correction of continuity is

A.

B.

C.

D.

None of the above

 
 

Option: A

Explanation :




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