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For a group of 100 candidatges the mean ...

For a group of 100 candidatges the mean and standard deviation of their marks were found to be 60 and 15 respectively. Later on it was found that the scores 45 and 72 were wrongly entered as 40 and 27. Find the correct means and standard deviation.

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The correct Answer is:
14.61
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PREMIERS PUBLISHERS-STATISTICS AND PROBABILITY -OTHER IMPORTANT OBJECTIVE TYPE QUESTIONS
  1. For a group of 100 candidatges the mean and standard deviation of thei...

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  2. If the sum and mean of the data are 418 and 11 respectively then the n...

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  3. The coefficient of range of the data 20, 62, 43, 48, 13, 34, 39, is :

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  4. If the standard deviation of the data 2, 3, 5, 7, 8, is 2.28 what will...

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  5. The variance of first 10 natural numbers is:

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  6. The mean of the data is 16 and the coefficient of varation is 12.5. Fi...

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  7. Batsmen A and B have their coefficient of variation as 13.5% and 25% r...

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  8. When a dice is thrown, the probability of getting an odd number is:

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  9. When two dice is thrown, the probability of getting sum of the number ...

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  10. A bag contains 6 blue balls and 5 green balls and 2 red balls. A ball ...

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  11. Two dice are rolled. Find the probability that the sum of the outcome ...

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  12. From a well shuffled pack of 52 cards one card is selected at random. ...

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  13. A year is selected at random. What is the probability that {:("(...

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  14. Three fair coins are tossed together. Find the probability of getting ...

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  15. If P(A)=0.5, P(B)=0.3, P(AcapB)=0.25. Find P(AcupB)

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  16. Ia A and B are mutually exclusive, given P(AcupB)=(3)/(5), P(A)=(1)/(2...

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  17. Given A and B are mutually exclusine events P(not A)= 0.35 P(AcupB)=0....

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  18. Find the odd one out:

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  19. The sum of all deviations of the data from its mean is

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  20. The range of 6, 6, 6, 6, 6, 6, 6 is:

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  21. If the standard deviation of a, b, c is sigma this standard deviation ...

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