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The mean and standard deviation of six o...

The mean and standard deviation of six observation are 8 and 4 respectively. If each observation is multiplied by 3, Find the new mean and new standard deviation of the resulting obervations.

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The correct Answer is:
` = 12`
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SUBHASH PUBLICATION-STATISTICS AND PROBABILITY -TWO MARKS QUESTIONS WITH ANSWERS
  1. Find the mean deviation about the mean.

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  2. Compute the mean deviation about the mean for the following data.

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  3. Compute the mean deviation about the mean for the following data.

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  4. Find the M.D. about mean

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  5. Compute the mean deviation about the mean for the following data.

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  6. Compute the mean deviation about the mean for the following data.

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  7. Find the mean for the following data :

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  8. Find variance and standard deviation for the following data

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  9. Find the mean and standard deviation using short - cut method.

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  10. Find variance and standard deviation for the following data

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  11. Find the mean and variance for the following frequency distributions

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  12. Find variance and standard deviation for the following data

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  13. The coefficient of variation for a distribution is 60 and standard dev...

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  14. An analysis of monthly wages paid to the workers of two firms A and B ...

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  15. From the data given below state which group is more variable, A or B ?

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  16. From the prices of shares X and Y below, Find out which is more stable...

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  17. The mean and variance of 7 observations are 8 and 16 respectively. If ...

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  18. The mean and variance of 7 observations are 8 and 16 respectively. If ...

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  19. The mean and standard deviation of six observation are 8 and 4 respect...

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  20. The mean and standard deviation of marks obtained by 50 students of a ...

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