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The men deviation of first 7 natural num...

The men deviation of first 7 natural numbers from mean is

A

`7//2`

B

`3//2`

C

`12//7`

D

`7//12`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-MEASURES OF DISPERSION (STATISTICS)-Practice Exercise
  1. The geometric mean of observation 2,4,16 and 32 is

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  2. The geometric mean of 5,8,10,15,20,25,30,35 is

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  3. The men deviation of first 7 natural numbers from mean is

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  4. Mean deviation of first three odd numbers from mean is

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  5. Mean deviation of 39,40,41,41,42,42,43,43,44,44, 45 through median is

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  6. Mean deviation from median of the data 90,100,125,115, 110 is

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  7. The mean deviation from mean of the data 90,100,125,115,110 is

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  8. The standard deviation of 7 scores 1,2,3,4,5,6,7 is

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  9. The standard deviation of 15 items is 6 and each item is decreased by ...

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  10. The standard deviation for the set of the numbers 1,4,5,7,8 is 2.45. I...

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  11. Standard deviation of 5,8,11,9,11 is

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  12. If the standard deviation of x(1),x(2),….,x(n) is 3.5 then the standar...

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  13. If the standard deviation of 0,1,2,3,4,5,6,7,8,9 is K, then the standa...

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  14. The variance of first 20 - natural numbers is

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  15. The variance of 6,8,10,12,14,16,18,20,22,24 is

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  16. Observe the following statements : (A) : 10 is the mean of a set of ...

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  17. A man motors from A to B. A large part of the distace is uphill and he...

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  18. An aeroplane files around a square, the sides of which measure 100 mil...

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  19. The mean of a data set consisting of 20 observation is 40. If one obse...

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  20. Mean of 100 observations is 50 and S.D. is 10. If 5 subtracted from ea...

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