7
17
To enter the standard deviation mode by pressing
, [SD] indicator lights up. If press , you can
enter the regression mode selection menu. [REG]
indicator will be turned on.
Before starting, be sure to clear the statistic memory by
pressing .
Perform the data input
(Precautions!)
.
• In SD mode, store the displayed data by pressing ,
pressing will input the same data twice.
• In REG mode, store the x-data and y-data in the form
of:
x-data y-data , pressing will input the
same data twice.
• Use for same data multiple entries.
For example in SD mode, the data 20 has 8 times will
press 20 8 .
• Press or key during or after data input can display
the data value (x) and data frequency (Freq). Follow
with the above example, press will display [x1 = 20],
and press will display [Freq1= 8].
• To edit the stored data, input the new value during the
display of that data value (x) after pressing or key,
and then press to confirm the edit. But, if you
press instead of , a new data value will be
stored.
• Press can delete the data during the display of
that data value (x) after or key is pressed; and the
sequence of the data which following the deleted data
will be shifted up automatically.
• Press or key to exit the data value and
frequency display, then you can perform other
calculation operations.
• Input data are stored in calculation memory. As the
memory full, [Data Full] will be displayed and you
cannot input or perform any calculation.
• After changing into another mode or regression type
(Lin, Log, Exp, Pwr, Inv, Quad), input data will be
cleared.
n
After finishing data entries, you can recall or calculate
the statistical values.
Standard Deviation
n
Press to enter SD mode.
n
Before starting, be sure to clear the statistical
memory by pressing .
n
You can recall the following statistical value after
input all data.
Summation of x ( x
)
Mean of x ( x )
Sum of Square ( x
2
)
Maximum value of x ( maxX )
Number of data sample ( n )
Minimum value of x ( minX )
Population Standard Deviation of x ( x
n
) Median value ( med )
Sample Standard Deviation of x ( x
n-1
)
Value (Symbol)
(Example #18)