Classical

Statistics and methodology - Statistics and Methodology Multiple Choice Questions

91:  

Match the following

List-I (Degree of correlation)     List-II (Measurement)

(A) Absence of correlation         1. +0.90 or More

(B) Moderate                               2. +1

(C) Perfect                                   3. +0.60 to +0.75

(D) Very high                               4. 0

A.

(A) (B) (C) (d)

1    2    3    4

B.

(A) (B) (C) (d)

4    3    2    1

C.

(A) (B) (C) (d)

3    1    4    2

D.

(A) (B) (C) (d)

3    2    1    4

 
 

Option: B

Explanation :


92:  

Given

Σdxdy = 186, Σdx = 11, Σdy = 7, N = 10, Σd2x = 215, Σd2y = 163.

Find out correlation

A.

+ 0.72

B.

+ 0.99

C.

+ 0.96

D.
 
 

Option: B

Explanation :

Hence the answers (b).


93:  

A machine on the average produces 5% defective articles. What are the mean and standard deviation in sets of 100 articles?

A.

5.3

B.

3.4

C.

2.2

D.

3.3

 
 

Option: C

Explanation :

Mean = np

= 100 x 0.05

= 5

σ = √(npq)

= √(0.05 x 0.95 x 100)

= 2.2

Hence the answer is (c).


94:  

If the proportion of defective in a bulk is 4%, find the probability of not more than 2 defectives in a sample of 10, it is known that e-4 = 6703

A.

99.2%

B.

3.06%

C.

9.36%

D.

4.02%

 
 

Option: A

Explanation :

Probability of not more than 2 defectives

= 0.6703 + 0.26812 + 0.053624

= 0.992044 x 100

= 99.2%

Hence the answer is (a).


95:  

Management science model consists

A.

Return on investment analysis

B.

Break-even analysis model

C.

Budgeting models

D.

All of the above

 
 

Option: D

Explanation :




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