<s>
Klecka	B-General_Concept
's	I-General_Concept
tau	I-General_Concept
( τ	O
)	O
is	O
a	O
statistic	O
which	O
is	O
used	O
to	O
test	O
whether	O
a	O
given	O
classification	B-General_Concept
analysis	I-General_Concept
improves	O
one	O
's	O
classification	B-General_Concept
to	O
groups	O
over	O
a	O
random	O
allocation	O
to	O
the	O
various	O
groups	O
under	O
consideration	O
.	O
</s>
<s>
Klecka	O
's	O
τ	O
was	O
developed	O
for	O
use	O
with	O
discriminant	B-General_Concept
analysis	I-General_Concept
.	O
</s>
<s>
The	O
raw	O
accuracy	O
of	O
discriminant	B-General_Concept
analysis	I-General_Concept
the	O
sum	O
of	O
correct	O
predictions	O
divided	O
by	O
the	O
total	O
number	O
of	O
cases	O
.	O
</s>
<s>
In	O
addition	O
to	O
its	O
use	O
in	O
discriminant	B-General_Concept
analysis	I-General_Concept
it	O
has	O
been	O
used	O
in	O
multiple	O
regression	O
analysis	O
,	O
probit	B-Architecture
regression	I-Architecture
,	O
logistic	O
regression	O
and	O
image	B-General_Concept
analysis	I-General_Concept
.	O
</s>
