Question

Find the coefficient of variation of the data 18,20,15,12,25

Answer 1

Answer:

I hope this answer is help you

Answer 2

24.6  is  the coefficient of variation

Step-by-step explanation:

18 , 20 , 15  , 12 , 25

Mean = (18 + 20 + 15 + 12 + 25)/5

= 90/5

= 18

         d =  xi - Mean              d²

18           0                             0

20          2                             4

15          -3                             9

12          -6                             36

25          7                             49

Sum         0                          98

∑d² = 98

σ = √ (∑d²/n)

=> σ = √98/5

=> σ = 4.427

coefficient of variation = (σ / Mean ) *100

= (4.427/18)*100

= 24.6

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