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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-STATISTICS-EXERCISE
  1. Find the mean deviation using mean for the following datas:

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  2. Find the mean deviation from median for the following tables:

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  3. Find the mean deviation from the short cut method.

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  4. Find the standard deviation from the followig datas: (a) 10,20,30,4...

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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 natural numbers.

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  14. Find the mean, variance and standard deviation of first n natural numb...

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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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