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Following are the marks obtained by 10 s...

Following are the marks obtained by 10 students of a class. Calculate standard deviation and coefficient of standard deviation.

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Calculation of Standard Deviation Using Direct Method

`barX=(sumX)/(N)=(110)/(10)=11`
`sigma=sqrt((sumx^(2))/(N))=sqrt((244)/(10))=sqrt(24.4)=4.94`
Coefficent of SD `=(sigma)/(barX)=(4.94)/(11)=0.45`
SD=4.94 marks, Coefficient of SD=0.45.
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