Question
The lifespans (in years) of ten beagles were 13; 13; 8; 8; 9; 10; 8; 12;...
The lifespans (in years) of ten beagles were 13; 13; 8; 8; 9; 10; 8; 12; 10; 8. Calculate the coefficient of variation of the dataset.
Homework Answers
Answer #1
Solution:
| x | x2 |
| 13 | 169 |
| 13 | 169 |
| 8 | 64 |
| 8 | 64 |
| 9 | 81 |
| 10 | 100 |
| 8 | 64 |
| 12 | 144 |
| 10 | 100 |
| 8 | 64 |
 x=99 |
x2=1019 |
Mean 
= (x
/ n) )
=13+13+8+8+9+10+8+12+10+8 / 10
=99 / 10
=9.9
Sample Standard deviation S=
x2-(x)2n
/ n-1
=1019-(99)210
/9
=1019-980.19
=38.99
=4.3222
=2.079
Co-efficient of Variation (Sample) = S /
⋅100%
= ( 2.079 /9.9)⋅100%
=21%
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