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The mean and standard deviation of 100 o...

The mean and standard deviation of 100 observations were calculated as 40 and 5.1 respectively by a student who took by mistake 50 instead of 40 for one observation. What are the correct mean sand standard deviation?

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The correct Answer is:
39.9,5
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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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