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The mean of n observations is X . If ...

The mean of `n` observations is ` X ` . If the first item is increased by 1, second by 2 and so on, then the new mean is ` X +n` (b) ` X +n/2` (c) ` X +(n+2)/2` (d) None of these

A

`bar(X) +n`

B

`bar(X)+(n)/(2)`

C

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

D

none of these

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-MEASURES OF CENTRAL TENDENCY-Exercise
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  2. The weighted mean of the first n natural numbers whose weights are equ...

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  3. The mean of n observations is X . If the first item is increased by...

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  4. If bar X1 and bar X2 are the means of two series such that bar X1 lt...

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  5. The mean of the series x1, x2,...xn is barX. If x2 is replaced by lamb...

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  6. The mean income of a group of workers is bar(X) and that of another gr...

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  7. If the variable takes values 0,1,2,…, n with frequencies q^(n),""^(n)C...

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  8. The AM of n observations is M. If the sum of n-4 observations is a, ...

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  9. The sum of squares of the deviation of the values of the variable is w...

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  10. If each of n numbers x(i)=i, is replaced by (i+1)x(i), then the new me...

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  11. The mean age of a combined group of men and women is 25 years. If the ...

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  12. Iin a moderately skewed distribution the values of mean and median ar...

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  13. One of the methods of determining mode is (a) Mode = 2 Median 3 Mean ...

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  14. The positional average of central tendency is

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  15. For dealing with qualitative data the best average is:- a) AM b) GM ...

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  16. If a variable takes discrete values x+4, x-(7)/(2), x-(5)/(2), x-3, x-...

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  17. Which one of the following is not a measure of central value: (a) Me...

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  18. If y = f(x) be a monotonically increasing or decreasing function of ...

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  19. The median can graphically be found from

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  20. If in a moderately asymmetrical distribution the mode and the mean of ...

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