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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, respectivey by a student who took by mistake 50 instead of 40 for one observations. The correct standard deviation is

A

5

B

4

C

6

D

10

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-MEASURES OF DISPERSION-EXERCISE-1
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  5. The variance of 20 observations is 5. If each observations is multipli...

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  6. The mean of four observations is 3. If the sum of the squares of these...

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  7. If x(1), x(2),…..x(n) are n observations such that Sigmax(i)^(2)=400 a...

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  8. In 100 numbers, 80 numbers are 4's and the rest are 9's then the stand...

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  9. If the standard deviation of the number 2, 3, a and 11 is 3.5, then wh...

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  10. The mean of the data set comprising of 16 observations is 16. If one o...

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

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  14. The measure of dispersion which is used to find more consistent data i...

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  15. Two teams A and B have the same mean and their coefficients of varianc...

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  16. If standard deviation of a data is 3, arithmetic mean is 20, then coef...

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