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If the mean of 10 observations is 50 and...

If the mean of 10 observations is 50 and the sum of the squares of the deviations of the observations from the mean is 250, then the coefficient of variation of those observations is

A

25

B

50

C

10

D

5

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-MEASURES OF DISPERSION (STATISTICS)-Exercise - I
  1. For a series the information available is n = 10 sum x = 60, sum x^(2)...

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  2. Coefficient of variation of a distribution is 60 and its standard devi...

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  3. If the mean of 10 observations is 50 and the sum of the squares of the...

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  4. Standard deviation of first 'n' natural numbers is

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  5. The variance of the first 50 even natural numbers is

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  6. The median and S.D. of a distribution are 20 and 4 respetively. If eah...

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  7. The standard deviation of 26, 27, 31, 32, 35 is

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  8. The standard deviation of a, a+d, a + 2d,….a + 2nd is

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  9. The variance of first 10 multiples of 3 is

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  10. For a group of 50 male workers, the mean and S.D. of their daily wages...

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  11. If standard deviation of 1,2,3,4,….,10 is sigma then standard deviatio...

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  12. The standard deviation of a variable x is sigma. The standard deviatio...

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  13. The variance of observation x(1), x(2),x(3),…,x(n) is sigma^(2) then t...

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  14. The standard deviations of two sets containing 10 and 20 members are 2...

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  15. The standard deviation of the observations 22, 26, 28, 20, 24, 30 is

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  16. The mean of five observations is 4 and their variance is 5.2. If three...

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  17. Which of the following is correct relations a symmetrical distribution...

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  18. One of the methods of determining mode is

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  19. Which of the following is correct for data -1, 0, 1,2,3,5,5,6,8,10,11

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  20. If m is mean of distribution, then sum(x(i) - m) is equal to

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