Question

calculate coefficient of variation of
marks Secured by a Student in the
exam , where the marks are .
91 96 88 98,82 .
​

Answer 1

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