<s>
In	O
statistics	O
,	O
the	O
standardized	B-General_Concept
mean	I-General_Concept
of	I-General_Concept
a	I-General_Concept
contrast	I-General_Concept
variable	I-General_Concept
(	O
SMCV	B-General_Concept
or	O
SMC	O
)	O
,	O
is	O
a	O
parameter	O
assessing	O
effect	B-Application
size	I-Application
.	O
</s>
<s>
The	O
SMCV	B-General_Concept
is	O
defined	O
as	O
mean	O
divided	O
by	O
the	O
standard	B-General_Concept
deviation	I-General_Concept
of	O
a	O
contrast	O
variable	O
.	O
</s>
<s>
When	O
there	O
are	O
only	O
two	O
groups	O
involved	O
in	O
a	O
comparison	O
,	O
SMCV	B-General_Concept
is	O
the	O
same	O
as	O
the	O
strictly	B-General_Concept
standardized	I-General_Concept
mean	I-General_Concept
difference	I-General_Concept
(	O
SSMD	B-General_Concept
)	O
.	O
</s>
<s>
In	O
ANOVA	B-General_Concept
,	O
a	O
similar	O
parameter	O
for	O
measuring	O
the	O
strength	O
of	O
group	O
comparison	O
is	O
standardized	O
effect	B-Application
size	I-Application
(	O
SES	O
)	O
.	O
</s>
<s>
SMCV	B-General_Concept
does	O
not	O
have	O
such	O
an	O
issue	O
.	O
</s>
<s>
The	O
population	O
value	O
(	O
denoted	O
by	O
)	O
of	O
SMCV	B-General_Concept
can	O
be	O
used	O
to	O
classify	O
the	O
strength	O
of	O
a	O
comparison	O
represented	O
by	O
a	O
contrast	O
variable	O
,	O
as	O
shown	O
in	O
the	O
following	O
table	O
.	O
</s>
<s>
This	O
classifying	O
rule	O
has	O
a	O
probabilistic	O
basis	O
due	O
to	O
the	O
link	O
between	O
SMCV	B-General_Concept
and	O
c+	O
-probability	O
.	O
</s>
<s>
The	O
estimation	O
and	O
inference	O
of	O
SMCV	B-General_Concept
presented	O
below	O
is	O
for	O
one-factor	O
experiments	O
.	O
</s>
<s>
Estimation	O
and	O
inference	O
of	O
SMCV	B-General_Concept
for	O
multi-factor	O
experiments	O
has	O
also	O
been	O
discussed	O
.	O
</s>
<s>
The	O
estimation	O
of	O
SMCV	B-General_Concept
relies	O
on	O
how	O
samples	O
are	O
obtained	O
in	O
a	O
study	O
.	O
</s>
<s>
Methods	O
of	O
estimation	O
for	O
SMCV	B-General_Concept
and	O
c+	O
-probability	O
in	O
matched	O
contrast	O
analysis	O
may	O
differ	O
from	O
those	O
used	O
in	O
unmatched	O
contrast	O
analysis	O
.	O
</s>
<s>
The	O
confidence	O
interval	O
of	O
SMCV	B-General_Concept
can	O
be	O
made	O
using	O
the	O
following	O
non-central	O
t-distribution	O
:	O
</s>
<s>
A	O
confidence	O
interval	O
for	O
SMCV	B-General_Concept
can	O
be	O
made	O
using	O
the	O
following	O
non-central	O
t-distribution	O
:	O
</s>
