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The mean and standard deviation of 20 ob...

The mean and standard deviation of 20 observations are found to be 10 and 2, respectively. One rechecking, it was found that an observation 8 was incorrect. Calculate the correct mean and standard deviation in each of the following cases. (i) If

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The correct Answer is:
(i) 10.1, 2.02 (ii) 10.1, 1.947
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NAGEEN PRAKASHAN ENGLISH-STATISTICS-EXERCISE
  1. Find the mean deviation using arithmetic mean for the following observ...

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  2. Find the mean deviation using median for the following observations: ...

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  3. Find the mean deviation using arithmetic mean for the following

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  4. Find the mean deviation using median for the following datas:

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  5. Find the standard deviation from the following datas:

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  6. Find the standard deviation from the following datas, using assumed me...

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  7. Find the standard deviation from the following datas, using assumed me...

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  8. Find the standard deviation from the following datas, using assumed me...

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  9. The mean and variance of 5 observations are respectively 4.4 and 8.24....

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  10. The mean and variance of 8 observations are respectively 9 and 9.25. I...

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  11. The mean and standard deviation of 100 observations were calculated as...

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

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  13. Calculate the mean and standard deviation of first n natural numbers.

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  14. Calculate the mean and standard deviation of first natural numbers.

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  15. Find out the standard deviation from the following distribution table:

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  16. If the coefficients of variations for two distributions are 40 and 50 ...

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  17. Find which group is more variable:

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  18. The arithmetic means of two distributions are 20 and 35 and their S.D....

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  19. Find which group is more variable:

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  20. In the following table, the mean and S.D. of the income of the employe...

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