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Consider the numbers 1,2,3,4,5,6,7,8,9,1...

Consider the numbers 1,2,3,4,5,6,7,8,9,10. If 1 is added to each number, the variance of the numbers so obtained is (a) 6.5           (b) 2.87           (c) 3.87        (d) 8.25

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RD SHARMA ENGLISH-STATISTICS-All Questions
  1. If for a sample of size 60, we have the following information sumxi^2=...

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  2. The mean and standard deviation of 20 observations are found to be ...

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  3. Consider the numbers 1,2,3,4,5,6,7,8,9,10. If 1 is added to each num...

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  4. If for distribution of 18 observations sum(xi-5)=3a n dsum(xi-5)^2=43 ...

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  5. If the men and standards deviation of 100 observations are 50 and 4 ...

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  6. Let x1,\ x2,\....,\ xn values of variable X and let 'a' be non zero re...

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  7. If two variates X a n d Y are connected by the relation Y=(a X+b)/c ,w...

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  8. Let x1, x2, x3, , be n values of a variable X. If these values are ch...

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  9. If for a sample of size 60, we have the following information sumxi^2=...

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  10. The weight of coffee in 70 jars is shown in the following table: Weigh...

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  11. Suppose that samples of polythene bags from two manufacturers, A and B...

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  12. Let x1, x2, ...... ,xn be values taken by a variable Xa n dy1, y2,......

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  13. The sum of the squares of deviation of 10 observations from their mean...

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  14. If the S.D. of a set of observations is 8 and if each observation is ...

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  15. Find the mean and variance of frequency distribution given below: xi :...

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  16. The mean deviation of the series a , a+d , a+2d , , a+2n from its mea...

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  17. The standard deviation of the data: x : , 1, a , a^2 , ..., a^n f: , ...

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  18. The mean deviation of the numbers 3,4,5,6,7 from the mean is(a) 25  ...

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  19. A batsman scores run in 10 innings as 38,70,48,34,42,55,63,46,54 and ...

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  20. The scores of a batsman in 10 matches were as follows: 38,70,48,34,...

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