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The algebraic sum of deviations of ten o...

The algebraic sum of deviations of ten observations about 15 is 70. The mean is

A

22

B

25

C

20

D

none of these

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A
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ML KHANNA-MEASURES OF CENTRAL TENDENCY -Problem Set (1) (Measures of Central Tendency)
  1. The median of the following items 25,15,23,40,27,25,23,25 and 20 is

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  2. The median of the variables x+4,x-7//2,x-5//2x-3,x-2,x+1//2,x-1//2,x+5...

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  3. The algebraic sum of deviations of ten observations about 15 is 70. Th...

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  4. A distribution has mean =8*7, median =8*5 and mode =7*3. The distribut...

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  5. The average of daily wages for the workers of the two factories combin...

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  6. Marks obtained by four students are : 25, 35, 45, 55. The average de...

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  7. The quartile deviation of the income of a certain person given in rupe...

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  8. The weighted mean of first n natural numbers whose weights are equal t...

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  9. The arithmetic mean of n numbers of a series is bar(x). The sum of the...

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  10. If a variate takes values a, ar,ar^(2),..ar^(n-1) which of the relatio...

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  11. A population of values is symmetrically distributed about the constant...

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

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  13. An aeroplane flies round a square, the sides of which measure 100 mile...

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

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  15. If the mean of a variate x is m, the mean of (ax+b)/(c ) where a,b,c a...

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  16. The numbers 3,5,7,4 have frequencies x,x+4,x-3,x+8. If their arithmeti...

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  17. If the mean of a set of observations x(1),x(2), …,x(n)" is " bar(X), t...

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  18. If the mode and mean of a moderately asymmetrical series are 16 inche...

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  19. The results of two colleges are as follows : then

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  20. If g(1) and g(2) be the geometric means of two series of n(1) and n(2)...

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