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

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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  10. The variance of 20 observations is '5 .' If each observation is multip...

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  11. The mean of 5 observations is 4.4 and their variance is 8.24.If three ...

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  12. If each of the observation x1,x2,………..xn is increased by 'a',where a...

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  15. The mean and standard deviation of six observations are 8 and 4, respe...

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  19. Find the variance and standard deviation for the following data 65,68...

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  20. If each of the observation x1,x2,………..xn is increased by 'a',where a...

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