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HP 46 User Manual

HP 46
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Mean
and
Standard
Deviation
To
calculate
the
mean
and
standard
deviationf
of
a
group
of
numbers,
first
total
the
numbers
as
described
earlier
by
keying
in
each
value
and
pressing
>
+.
When
all
values
are
totaled,
press
mmm
x
4
.The
following
information
is
printed:
e
number
of
entries
(#)
e
standard
deviation
(&)
e
mean
(x)
The
standard
deviation
is
placed
in
Y.
The
mean
is
placed
in
X.
The
previous
x
and
y
values
are
erased.
EXAMPLE
A.
In
a
recent
survey
to
determine
the
average
age of
the
10
wealthiest
people
in
the
U.S.,
the
following
data
was
obtained:
62
84
47
58
68 60
62 59
71
73
Of
the
ages
given,
what
is
the
mean?
The
standard
deviation?
Press:-
CLEAR
CLR
62000
Z"’
4
84000
Z"’
62
84
47
-
47.00
I+
58.00
I+
8
o8
o0
e
0
$2.00
I+
62+
59
=
71
59.00
I+
7100
i+
73.00
Z+
73-
B
10,00
o
'
10.10
A9
64440
X
O
1\
/E
2
_1/n
(Zx)?
'f‘The
formula
used
for
standard
deviation
is:
A
=
cx
niex
1/n
(2x)
n_
28

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HP 46 Specifications

General IconGeneral
BrandHP
Model46
CategoryCalculator
LanguageEnglish

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