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The mean of the squares of first natura...

The mean of the squares of first natural numbers is

A

`frac(1)(2)n^2`

B

`frac(1)(8)n(n+1)`

C

`frac(1)(6)n(2n+1)`

D

`frac(1)(6)(n+1)(2n+1)`

Text Solution

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The correct Answer is:
D
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PATHFINDER-STATISTICS AND MATHEMATICAL REASONING-QUESTION BANK
  1. The Mean of a set of numbers is overlinex . If each number is incre...

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  2. The mean of a set of numbers is overlinex . If such numbers is multip...

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  3. The mean of the squares of first natural numbers is

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  4. For a continuous series the mean is computed by the following formula

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  5. If the mean of first n natural numbers is equal to (n+7)/3 , then n i...

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  6. The mean of discrete observation y1, y2,…yn is given by

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  7. The mean of 130, 126, 68, 50, 1 is

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  8. If di is the deviation of a class mark yi from 'a' the ' assumed mean ...

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  9. The mean of first three terms is 14 and mean of next two terms is 18. ...

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  10. Geometric mean of the numbers 2, 2^2, 2^3, ….,2^(n) numbers is

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  11. The geometric mean of numbers observations x1, x2, x3,….,xn is

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  12. The geometric mean of numbers observations 4, 8, 16, is

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  13. The harmonic mean of 4, 8, 16, is

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  14. The harmonic mean of 3, 7, 8, 10, 14, is

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  15. Product of n positive number is unity. The sum of these numbers can n...

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  16. In an arranged series of n observations (n being an odd number), the ...

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  17. The median of 10, 14, 11, 9, 8, 12, 6, is

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  18. If a variable takes the discrete values alpha+4 , alpha-(7)/(2), alpha...

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  19. In an arranged discrete series in which total number of observations ...

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  20. The mode of following items 0, 1, 6, 7, 2, 3, 7, 6, 6, 2, 6, 0, 5, 6,...

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