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For a group of 200 candidates, mean was ...

For a group of 200 candidates, mean was found to 40 but it was discovered later that the scores of 43 and 35 were misread as 34 and 53 respectively. Then the correct mean is

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For a group of 200 candidates the mean and S.D. were found to be 40 and 15 respectively. Later on it was found that the score 43 was misread as 34. Find the correct mean and correct S.D.

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RD SHARMA ENGLISH-STATISTICS-All Questions
  1. The mean and standard deviation of six observations are 8 and 4, re...

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  2. The mean and variance of eight observations are 9 and 9.25, respect...

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  3. For a group of 200 candidates, mean was found to 40 but it was discove...

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

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  5. The mean and standard deviation of 20 observations are found to be 1...

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  6. The mean and standard deviation of a group of 100 observations were...

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  7. Show that the two formulae for the standard deviation of ungrouped d...

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  8. Find the variance and standard deviation for the following distribu...

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  9. Table below shows the frequency f with which x alpha particles were ra...

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  10. Calculate the mean and S.D for the following data: Expenditure (in...

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  11. Calculate the standard deviation for the following data: Class 0-...

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

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  13. Calculate the mean, median and standard deviation of the following ...

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  14. Calculate mean, variance and standard deviation of the following fr...

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  15. An analysis of monthly wages paid to workers in two firms A and B, bel...

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  16. An analysis of monthly wages paid to workers in two firms A and B, bel...

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  17. The following values are calculated in respect  of heights and weights...

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  18. If the heights of 5 persons are 140 cm, 150cm,158cm, 152 cm and 161 cm...

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  19. The sum and sum of squares corresponding to length x (in cm) and weigh...

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  20. Two plants A and B of a factory show following results about the numbe...

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