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Standard deviation of first 'n' natural ...

Standard deviation of first 'n' natural numbers is

A

`(sqrt(n-1))/(nm)`

B

`(sqrt(n^(2)+1))/(12)`

C

`(sqrt(n^(2)-1))/(12)`

D

None

Text Solution

Verified by Experts

The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-MEASURES OF DISPERSION-EXERCISE-1
  1. The standard deviation of 5, 12, 3, 18, 6, 8, 2, 10 is

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  2. Standard deviation of 27, 35, 40, 35, 36, 29 is

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

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

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  5. If the median of the data 6, 7, x-2, x, 18, 21 written in ascending or...

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  6. The variance of the following data is

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  7. The variance of the following data is

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  8. The standard deviation of the following data is

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  9. The mean and variance of seven observations are 8 and 16 respectively....

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  10. The mean of 5 observations is 4.4 and their variance is 8.24. If three...

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  11. The arithmetic mean of the observations 10, 8, 5, a, b is 6 and their ...

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  12. The variance of 20 observations is 5. If each observations is multipli...

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  13. The mean of four observations is 3. If the sum of the squares of these...

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  14. If x(1), x(2),…..x(n) are n observations such that Sigmax(i)^(2)=400 a...

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  15. In 100 numbers, 80 numbers are 4's and the rest are 9's then the stand...

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  16. If the standard deviation of the number 2, 3, a and 11 is 3.5, then wh...

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  17. The mean of the data set comprising of 16 observations is 16. If one o...

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  18. The mean and standard deviation of 100 observations were calculated as...

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  19. The arithmetic mean and standard deviation of a set of 9 items are 43 ...

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  20. All the student of a class performed poorly in Mathematics. The teache...

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