E-22
Data Input Precautions
•
S
S
inputs the same data twice.
• You can also input multiple entries of the same data
using
A
G
. To input the data 110 ten times, for example,
press 110
A
G
10
S
.
• You can perform the above key operations in any order,
and not necessarily that shown above.
• While inputting data or after inputting data is complete,
you can use the
[
and
]
keys to scroll through data
you have input. If you input multiple entries of the same
data using
A
G
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).
To recall this type of value:
Perform this key operation:
Σ
x
2
A
U
1
Σ
x
A
U
2
n
A
U
3
o
A
X
1
σ
n
A
X
2
σ
n
-
1
A
X
3
•
Example:
To calculate
σ
n
1
,
σ
n
,
o
,
n
,
Σ
x
, and
Σ
x
2
for
the following data : 55, 54, 51, 55, 53, 53, 54, 52
In the SD Mode:
A
B
1
(Scl)
=
(Stat clear)
55
S
Each time you press
S
to register your input,
the number of data input up to that point is
indicated on the display (
n
value).
54
S
51
S
55
S
53
S
S
54
S
52
S
Sample Standard Deviation (
σ
n
1
) =
1.407885953
A
X
3
=
Population Standard Deviation (
σ
n
) =
1.316956719
A
X
2
=
Arithmetic Mean (
o
) =
53.375
A
X
1
=
Number of Data (
n
) =
8
A
U
3
=
Sum of Values (
Σ
x
) =
427
A
U
2
=
Sum of Squares of Values (
Σ
x
2
) =
22805
A
U
1
=
1.
n =
SD
