calculate coefficient of variation of
marks Secured by a Student in the
exam , where the marks are .
91 96 88 98,82 .
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i hope this could be the answer
x. d=x-a. d^2
82. -9. 81
88. -3. 9
a 91. 0. 0
96. 5. 25
98. 7. 49
n=5. £d=0. £d^2=164
s.d=√£d^2÷n
s.d=√164÷5
s.d=√32.8
s.d=5.727
mean=91
c.v=s.d÷mean×100
c.v=5.727÷91×100
c.v=0.0629×100
c.v=6.29
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