E-18
Inputting Data
• In the SD Mode and REG Mode, the
l
key operates as the
7
key.
• Always start data input with
!,
(CLR)
b
(Scl)
=
to clear
statistical memory.
• Input data using the key sequence shown below.
SD Mode: <
x
-data>
7
REG Mode: <
x
-data>
,
<
y
-data>
7
•
77
inputs the same data twice.
• You can also input multiple entries of the same data using
!
,
(;).
Data Input Precautions
• While inputting data or after inputting data is complete, you can use
the
f
and
c
keys to scroll through data you have input. If you
input multiple entries of the same data using
!
,
(;) to specify the
data frequency (number of data items) as described above, scrolling
through data shows both the data item and a separate screen for the
data frequency (Freq).
• Input the new value and then press the
=
key to replace the old
value with the new one. This also means that if you want to perform
some other operation, you should always press the
A
key first to
exit data display.
• Pressing the
7
key instead of
=
after changing a value on the
display registers the value you input as a new data item, and leaves
the old value as it is.
• You can delete a data value displayed using
f
and
c
by pressing
!
l
(CL). Deleting a data value causes all values following it to
be shifted up.
• The message “Data Full” appears and you will not be able to input any
more data if there is no memory left for data storage. If this happens,
press the
=
key to display the screen shown below.
Press
c
to exit data input without registering
the value you just input.
Press
b
if you want to register the value you
just input. If you do this, however, you will not be able to display or
edit any of the data you have input.
• After inputting statistical data in the SD Mode or REG Mode, you will
be unable to display or edit individual data items any longer after
perform either the following operations: changing to another mode;
changing the regression type.
• Entering the REG Mode and selecting a regression type (Lin, Log,
Exp, Pwr, Inv, Quad) clear variables A through F, X, and Y.
• Do not use variables A through F, X, or Y to store data when
performing statistical calculations.
Obtaining Statistical Values from Input Data
Supported statistical variables and the keys you should press to recall
them are shown below. For single-variable statistical calculations, the
variables marked with an asterisk (*) are available.
Sum:
Σ
x
2
*,
Σ
x
*,
Σ
y
2
,
Σ
y
,
Σ
xy
,
Σ
x
3
,
Σ
x
2
y
,
Σ
x
4
,
Number of Items:
n
*
Σ
x
2
,
Σ
x
,
n
..........
1
1
(S-SUM)
1
to
3
Σ
y
2
,
Σ
y
,
Σ
xy
.......
1
1
(S-SUM)
e
1
to
3