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The arithmetic mean of a set of observat...

The arithmetic mean of a set of observations is `bar(X)`. If each observation is divided by `alpha` and then is increased by 10, then the mean of the new series is

A

`(bar(X))/(alpha)`

B

`(bar(X)+10)/(alpha)`

C

`(bar(X)+10alpha)/(alpha)`

D

`alpha bar(X) + 10`

Text Solution

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  18. The positional average of central tendency is

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

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

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