Statistics MCQ Set 5

STATISTICS MCQ SET 5

1. Find the mean deviation about the median for the following data :
4 , 6 , 9 , 3 , 10 , 13 , 2 .

(a) 3.28

(b) 2.38

(c) 4.28

(d) 3.38

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Answer: A

2. The mean deviation median for the given data :
52 , 56 , 66 , 70 , 75 , 80 , 82 is :

(a) 9

(b) 7

(c) 3

(d) 6

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Answer: A

3. Compute Coefficient of M.D. from median for following series .
3 , 7 , 12 , 14 , 15 , 18 , 22

(a) 0.226

(b) 0.336

(c) 0.356

(d) 0.426

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Answer: B

4. The mean deviation about mode for the given data :
7 , 4 , 10 , 9 , 15 , 12 , 7 , 9 , 7 is:

(a) 2.36

(b) 2.56

(c) 2.16

(d) 3.56

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Answer: B

5. The mean deviation about mode for the given data :
2 , 4 , 4 , 3 , 2 , 4 , 1 is :

(a) 1.142

(b) 1.243

(c) 1.213

(d) 1.321

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Answer: A

6. If the mean is 25 and the standard deviation is 5 then the coefficient of variation is :

(a) 20%

(b) 48%

(c) 60%

(d) 27%

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Answer: A

7. If the standard deviation of a set  of numbers is 3 and the arithmetic mean of these numbers is 6 , what is the coefficient of variation of these numbers?

(a) 125

(b) 75

(c) 50

(d) 100

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 Answer: C

8. The median of a set of 11 distinct observations is 73.2 . If each of the largest five observations of the set is increased by 3 , then the median of the new set :

(a) Is 3 times that of the original set

(b) Is increased by 3

(c) Remains the same as that of the original set

(d) Is decreased by 3

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Answer: C

9. The median of a set of observations 15 , 16 , 18 , 22 , x + 2 , x + 3 , 26 , 27 , 30 arranged in ascending order is 24 , then find the value of x .

(a) 26

(b) 25

(c) 20

(d) 22

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Answer: D

10. The following are the marks of 9 students in a class . Find the median .
34 , 32 , 48 , 38 , 24 , 30 , 27 , 21 , 35

(a) 24

(b) 32

(c) 38

(d) 21

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Answer: B