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The variance of 20 observations is 5. if...

The variance of 20 observations is 5. if each observation is multiplied by 2, find the new variance of the resulting observations.

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The correct Answer is:
`2^2 xx 5`
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KUMAR PRAKASHAN-STATISTICS-TEXTBOOK ILLUSTRATIONS FOR PRACTICE WORK
  1. Find the mean and variance for each of the data : 6,7,10,12,13,4,8...

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  2. Find the mean deviation about the mean for the following data: 12,3,1...

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  3. Find the mean deviation about the median for the following data: 3,9,...

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  4. Find the mean deviation about the mean for the given data :

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  5. Find the mean deviation about the median for the given data:

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  6. Find the mean deviation about the median for the following data:

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  7. Calculate the mean deviation about median for the following data :

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  8. Find the variance of the following data: 6,8,10,12,14,16,18,20,22,24

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  9. Find the variance and standard deviation for the following data :

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  10. Calculate the mean , variance and standard deviation for the following...

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  11. Find the standard deviation for the following data:

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  12. Calculate the mean , variance and standard deviation for the following...

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  13. Two plant A and B of a factory show following results about the number...

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  14. Coefficient of variation of two distributions are 60 and 70 their stan...

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  15. The following values are calculated in respect of heights and weights ...

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  16. The variance of 20 observations is 5. if each observation is multiplie...

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  17. The mean of 5 observations is 4.4 and their variance is 8.24 . If thre...

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  18. If each of the observation x(1), x(2), ...,x(n) is increased by 'a', w...

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  19. The mean and standard deviation of 100 observation were calculated as ...

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