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The S.D. of the first n natural numbers ...

The S.D. of the first n natural numbers is

A

`(n+1)/(2)`

B

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

C

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

D

None of these

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The correct Answer is:
C
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FIITJEE-STATISTICS-Assignment Problems (Objective) Level II
  1. The S.D. of the first n natural numbers is

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  2. Which of the following in case of a discrete data, is not equal to the...

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  3. For a frequency distribution the mean deviation about mean is computed...

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  4. For a frequency distribution 7th decile is computed by the formula

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  5. For a given distribution of marks, the mean is 35.16 and its standard ...

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  6. The standard deviation for the set of numbers, 1,4,5,7,8 is nearly 2.4...

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  7. For a frequency distribution lower quartile is computed by

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  8. The upper quartile for the following distribution is given by the s...

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  9. Quartile deviation for a frequency distribution is

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  10. The variance of first n natural number is:

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  11. For a frequency distribution standard deviation is computed by

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  12. For a frequency distribution standard deviation is computed by applyin...

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  13. d(1) is the deviation of a class mark y(i) from 'a' the assumed mean a...

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  14. The difference between the highest and lowest values of the observa...

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  15. b(xy) xx b(yx) is equal to

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  16. Which of the following is true?

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  17. Which of the following is not possible

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  18. If ui=axi+b and vi =cyi+d then

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  19. If yi=axi+b for each i=1,2,3,........n, then

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  20. If e gt 0 and m=(byx +bxy)/(2), then

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