<s>
For	O
example	O
,	O
in	O
a	O
study	O
of	O
the	O
demand	O
for	O
money	O
,	O
the	O
unit	O
of	O
observation	O
might	O
be	O
chosen	O
as	O
the	O
individual	O
,	O
with	O
different	O
observations	O
(	O
data	B-Application
points	I-Application
)	O
for	O
a	O
given	O
point	O
in	O
time	O
differing	O
as	O
to	O
which	O
individual	O
they	O
refer	O
to	O
;	O
or	O
the	O
unit	O
of	O
observation	O
might	O
be	O
the	O
country	O
,	O
with	O
different	O
observations	O
differing	O
only	O
in	O
regard	O
to	O
the	O
country	O
they	O
refer	O
to	O
.	O
</s>
<s>
A	O
data	B-Application
point	I-Application
or	O
observation	O
is	O
a	O
set	O
of	O
one	O
or	O
more	O
measurements	O
on	O
a	O
single	O
member	O
of	O
the	O
unit	O
of	O
observation	O
.	O
</s>
<s>
For	O
example	O
,	O
in	O
a	O
study	O
of	O
the	O
determinants	O
of	O
money	O
demand	O
with	O
the	O
unit	O
of	O
observation	O
being	O
the	O
individual	O
,	O
a	O
data	B-Application
point	I-Application
might	O
be	O
the	O
values	O
of	O
income	O
,	O
wealth	O
,	O
age	O
of	O
individual	O
,	O
and	O
number	O
of	O
dependents	O
.	O
</s>
<s>
Statistical	O
inference	O
about	O
the	O
population	O
would	O
be	O
conducted	O
using	O
a	O
statistical	O
sample	O
consisting	O
of	O
various	O
such	O
data	B-Application
points	I-Application
.	O
</s>
<s>
In	O
addition	O
,	O
in	O
statistical	B-Application
graphics	I-Application
,	O
a	O
"	O
data	B-Application
point	I-Application
"	O
may	O
be	O
an	O
individual	O
item	O
with	O
a	O
statistical	O
display	O
;	O
such	O
points	O
may	O
relate	O
to	O
either	O
a	O
single	O
member	O
of	O
a	O
population	O
or	O
to	O
a	O
summary	O
statistic	O
calculated	O
for	O
a	O
given	O
subpopulation	O
.	O
</s>
<s>
The	O
measurements	O
contained	O
in	O
a	O
unit	O
of	O
observation	O
are	O
formally	O
typed	O
,	O
where	O
here	O
type	O
is	O
used	O
in	O
a	O
way	O
compatible	O
with	O
datatype	O
in	O
computing	O
;	O
so	O
that	O
the	O
type	O
of	O
measurement	O
can	O
specify	O
whether	O
the	O
measurement	O
results	O
in	O
a	O
Boolean	O
value	O
from	O
{	O
yes	O
,	O
no}	O
,	O
an	O
integer	O
or	O
real	O
number	O
,	O
the	O
identity	O
of	O
some	O
category	O
,	O
or	O
some	O
vector	O
or	O
array	B-Data_Structure
.	O
</s>
<s>
The	O
implication	O
of	O
point	O
is	O
often	O
that	O
the	O
data	O
may	O
be	O
plotted	O
in	O
a	O
graphic	O
display	O
,	O
but	O
in	O
many	O
cases	O
the	O
data	O
are	O
processed	B-General_Concept
numerically	I-General_Concept
before	O
that	O
is	O
done	O
.	O
</s>
<s>
In	O
the	O
context	O
of	O
statistical	B-Application
graphics	I-Application
,	O
measured	O
values	O
for	O
individuals	O
or	O
summary	O
statistics	O
for	O
different	O
subpopulations	O
are	O
displayed	O
as	O
separate	O
symbols	O
within	O
a	O
display	O
;	O
since	O
such	O
symbols	O
can	O
differ	O
by	O
shape	O
,	O
size	O
and	O
colour	O
,	O
a	O
single	O
data	B-Application
point	I-Application
within	O
a	O
display	O
can	O
convey	O
multiple	O
aspects	O
of	O
the	O
set	O
of	O
measurements	O
for	O
an	O
individual	O
or	O
subpopulation	O
.	O
</s>
