Classical

Statistics and methodology - Statistics and Methodology Multiple Choice Questions

111:  

Match the following

List-I (Computer based information system)     List-II (year)

(A) Management Information systems (MIS)               1. 1971

(B) Decision Support System (DSS)                               2. 1964

(C) Office Automation (OA)                                          3. 1990

(D) Artificial Intelligence (AI)

A.

(A) (B) (C) (D)

2    1    2    3

B.

(A) (B) (C) (D)

1    2    2    3

C.

(A) (B) (C) (D)

3    1    2    2

D.

(A) (B) (C) (D)

1    2    3    2

 
 

Option: A

Explanation :

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112:  

Given

N = 15, X¯ = 25, Y¯ = 18, Σdx2 = 136, Σdy2 = 138, Σdxdy = 122.

There correlation will be

A.

+0.89

B.

-0.89

C.

+0.39

D.

+0.072

 
 

Option: A

Explanation :

    =  122/136.935 =+0.89

Hence the answer is (a)

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113:  

In a sample having 23 pairs of observations, the correlation coefficient is 0.52 and in another sample having 28 observations, the correlation coefficient is 0.71. Is there significant difference between the two sample coefficients?

A.

5% level is not proper

B.

Difference is not significant

C.

Difference is significant

D.

95% level is significant

 
 

Option: B

Explanation :

N1 = 23, r1 = 0.52

N2 = 28, r2 = 0.71

Z1 for r1 = 0.52 (By reference to table)

= 0.58

Z2 for r2 = 0.71 (By reference to table)

= 0.89

The difference is not significant at 5% level of significant.

Hence the answers (b).

 

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114:  

What is the probability of selecting a king from a Pinochle desk?

A.

1/6

B.

1/4

C.

1/9

D.

1/54

 
 

Option: A

Explanation :

A Pinochle deck consists of

2 = Aces

2 = Kings

2 = Queens

2 = Jacks

2 = Tens and

2 = Nines of each suit

There are no card of lower than value.

Total number of cases.

= Total no. of cards (48).

Hence the answer is (a).

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115:  

The average number of customers per minute arriving at a super bazaar is 2. Using the Poisson distribution, find the probability that during one particular minute exactly three customers will arrive

A.

0.36

B.

0.180

C.

0.120

D.

0.130

 
 

Option: B

Explanation :

Hence the answer is (b).

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