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The weighted mean of the first n natural...

The weighted mean of the first n natural numbers whose weights are equal to the squares of the corresponding numbers is

A

`2n+1`

B

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

C

`(1)/(3)(2n+1)`

D

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

Text Solution

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-MEASURES OF CENTRAL TENDENCY-Exercise
  1. The AM of n numbers of a series is bar(X). If the sum of first (n-1)...

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  2. The mean of a set of numbers is overline(X). If each number is divided...

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  3. The weighted mean of the first n natural numbers whose weights are equ...

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  4. The AM of the series 1,2,4,8,16,..,2^(n) is

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  5. If the mean of n observations x1,x2,x3...xn is barx then the sum of de...

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  6. The one which is the measure of the central tendency is

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  7. The most stable measure of central tendency is

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  8. The mean of the distribution, in which the values of X are 1, 2, ..,n ...

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  9. 10 is the mean of a set of 7 observations and 5 is the mean of a set o...

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  10. A statistical measure which cannot be determind graphically is

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  11. The measure of central tendency of a statistical data which takes into...

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  12. An ogive is used to determine

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  13. The geometric mean of the series 1,2,4,8,16,....,2^n is

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  14. If G(1),G(2) are the geometric means fo two series of observations and...

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  15. If G is the GM of the product of r sets of observations with geometric...

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  16. A group of 10 items has arithmetic mean 6. If the arithmetic mean of 4...

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  17. The arithmetic mean of a set of observations is bar(X). If each observ...

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  18. The weighted mean of the first n natural numbers whose weights are equ...

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  19. If a variable takes value 0,1,2,3,....,n with frequencies 1,C(n,1),C(n...

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  20. The weighted mean of the first n natural numbers whose weights are equ...

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