Classical

Statistics and methodology - Statistics and Methodology Multiple Choice Questions

56:  

Given

X = 0.85Y, Y = 0.89X, σx = 3, r will be

A.

0.32

B.

0.46

C.

0.87

D.

0.39

 
 

Option: C

Explanation :

X = 0.85Y or Bxy = 0.85

Y = 0.89X or Byx = 0.89

r = √(Bxy x Byx) = √(0.85 x 0.89)

= √0.7565 = 0.87

Hence the answer is (c).


57:  

In two large populations there are 35 and 30 per cent of fair haired people. Will the difference disappear at 5% level of significance, if samples of 1500 and 1000 are respectively taken from the two populations?

A.

Difference is significant

B.

Significant with condition

C.

Difference is not significant

D.

Significant with error

 
 

Option: A

Explanation :

P1 = 35/100 = 0.35

P2 = 30/100 = 0.30

n1 = 1500, n2 = 1000

P1 - P2 = 0.35 - 0.30

= 0.05

The standard error of difference is –

Hence the difference is significant at 5% level of significance. It is unlikely that the difference will disappear.

Answer is (a).


58:  

Which one is not the type of utility of information

A.

Form utility

B.

Time utility

C.

Place utility

D.

Product utility

 
 

Option: D

Explanation :


59:  

Three helicopter crewmen are needed in an emergency. There are six crewmen on duty. In how many ways could three of them be chosen to fly the machine?

A.

20

B.

17

C.

30

D.

15

 
 

Option: A

Explanation :

n = 6, r = 3

Combinations = n!/(r!(n - r)!) = 6!/(3!(6 - 3)!)

= (6 x 5 x 4)/(3 x 2 x 1) = 20

Hence the answer is (a).


60:  

If the decision process are ______, the information technology choice will weigh in favour of those systems, where the acquisition, processing, analysis and decision making will be at distributed nodel points.

A.

Decentralised

B.

Managers process

C.

Business operation

D.

Centralised

 
 

Option: A

Explanation :




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