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22
Specific Features of the HP-33E
accumulated
in
the
stat istica
l
registers containing
n, Ix, and Ix:!
(R:z.
Ra,
and
R
..
).
The resultant
x va lue
is placed
in
the
X-register
and
display
.
2.
The
sample
standard deviation of
y
is
calculated
using data
acc
umulated
in the
statist ica
l
registers
containing n,
Iy,
Iy2
(R:z.
Rs.
and
R6)'
The
resultant
y value is
placed
in
the Y
-register.
Simply
press
In)')
to place
the y value
in
the
X-register
for use
.
Again,
as
in
the use
of
00
•
the
easiest
way to
accu mulate
the required
data
in
the
statisti
ca
l
registers
is
by
usi
ng
the
IEl
function
.
Example: Below
is
a chart
of
daily
high
and
low temperatures for a winter week
in Fairbanks.
Alas
ka.
What
are
the
average high and
low
temperatures and
the
standard
deviation of the high and
low
temperatures
for the
week
selected?
Sun
Mon
Tue
Wed
Thur
Fri
Sat
High
6
It
14
12
5
-2
-9
Low
-22
-t7
-t5
-9
-24
-29
-35
Keystrokes
Display
OJ
eLi
\R
IREGI
0.0000
Clears storage
registers.
(Assumes stack
cleared to
zeros.)
6
IEHTBI.I
22
10<51
-22.
[0
1.0000
First
en try.
Number of data
pairs
is
now
I.
II
IEHTBI.I 17 10<51
-17.
[0
2.0000
Second entry. Number of
pairs
is
now 2.
14
IEHTBI.I
15
10<51
-15.
[0
3.0000
ltd
~
~
~
~
~
~
~
!!=
~
~
g:
g:
g:
E=
g:
e=
e=
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