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The mean and the standard deviation (s,d...

The mean and the standard deviation (s,d) oFIGURE 10 observe are 20 and 2 respectively are 20 and 2 respectively. Each oFIGURE these 10 obsevations is multiplied by p and then reduced bu q. where `p ne 0` and `q ne 0`. IFIGURE the mean and new s.d. become oFIGURE their orginial values then q is equal to

A

-10

B

-20

C

-5

D

10

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The correct Answer is:
B
NA
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