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The variance of a data is 144, find the ...

The variance of a data is 144, find the standard deviation

A

3

B

4

C

6

D

9

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The correct Answer is:
B
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PUNEET DOGRA-STATISTICS-PRE YEAR QUESTIONS
  1. What is the median of the distribution 3, 7, 6, 9, 5,4, 2?

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  2. The mean of 7 observation is 10 and that of 3 observations is 5. What ...

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  3. Student of three sections of a class, having 30, 30 and 40 students ap...

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  4. Some measure central tendency for a discrete observations are given be...

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  5. The following table gives the continous frequency distribution of a co...

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  6. The following table gives the continous frequency distribution of a co...

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  7. If the regression coefficient of x and y on'x are -1/2 and -1/8 respec...

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  8. The side of a cube measures 9 cm. What will be the diagonal of the cub...

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  9. What is the cumulative frequency curve of statistical data commonly ca...

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  10. The average daily income of workers of a factory including that the o...

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  11. The variance of a data is 144, find the standard deviation

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  12. The mean deviation of the data 2, 9, 9, 3, 6, 9, 4 from the mean is : ...

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  13. Which of the following statement best describes frequency?

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  14. Find the median of the following data :

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  15. The frequency distribution of life of 90 TV tubes whose medians is 17 ...

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  16. The frequency distribution of life of 90 TV tubes whose medians is 17 ...

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  17. The frequency distribution of life of 90 TV tubes whose medians is 17 ...

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  18. The distributions X and Y with total number of observations 36 and 64 ...

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  19. Let barx be The the mean of x(1),x(2),x(3)…x(n) if x(i) = a +cy(i) ,...

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  20. Find the mode of the following data :

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