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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:
Σx
2
A U 1
Σx A U 2
n A U 3
o A X 1
σn A X 2
σn-1 A X 3
• Example:To calculate σnҀ1, σn, o, n, Σx, and Σx
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 (σnҀ1) =
1.407885953
A X 3 =
Population Standard Deviation (σn) =
1.316956719
A X 2 =
Arithmetic Mean (o) =
53.375
A X 1 =
Number of Data (n) =
8
A U 3 =
Sum of Values (Σx) =
427
A U 2 =
Sum of Squares of Values (Σx
2
) =
22805
A U 1 =
1.
n=
SD