<s>
In	O
statistics	O
,	O
McKay	B-General_Concept
's	I-General_Concept
approximation	I-General_Concept
of	O
the	O
coefficient	O
of	O
variation	O
is	O
a	O
statistic	O
based	O
on	O
a	O
sample	O
from	O
a	O
normally	O
distributed	O
population	O
.	O
</s>
<s>
Statistical	O
methods	O
for	O
the	O
coefficient	O
of	O
variation	O
often	O
utilizes	O
McKay	B-General_Concept
's	I-General_Concept
approximation	I-General_Concept
.	O
</s>
<s>
Let	O
and	O
denote	O
the	O
sample	O
mean	O
and	O
the	O
sample	B-General_Concept
standard	I-General_Concept
deviation	I-General_Concept
,	O
respectively	O
.	O
</s>
