CITIZEN SRP-265N - Manual (Page 16)

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2009/4/15
-E15-
The sample standard deviation S is defined as :
( )
1 n
n
x
– x
2
2
−
∑
∑
The population standard deviationσis defined as :
( )
n
n
x
– x
2
2 ∑
∑
The arithmetical mean x is defined as :
n
x ∑
• To delete an incorrect entry, press [ DEL ].
PROGRAMMING
With your programmable scientific calculator, complex repeated
calculations are no longer time–consuming chores. All you have to do
is tell the calculator what you want to do in a way it can understand (in
other word, program it).
Your calculator can store one procedure with up to 40 steps. These
“steps” can be either steps (like mathematical functions) or characters
(like numbers). Each function counts as one steps. It remembers the
procedure even after you turn off the calculator. You can have more
than one variable in your calculation.
Your calculator learns mathermatical procedures or programs in the
program (PGM) mode. To set the calculator to the program mode,
press [ 2ndF ] [ PGM ]. PGM appears on the display.
Now enter your procedure as if you were just going to calcualte it once
─
except─press [ 2ndF ] [ [X] ] before entering variable data. You get
your first answer while you are still in the PGM mode.
Note : If you press [ 2ndF ] [ [X] ] then [‧] or a number, and
then [ EXP ], [ +/– ], [ ) ] or [ CE ], both the number and
the first function following the number are treated as one
variable─they are not written into the program as steps.
Remember, you can enter a maximum of 40 steps. If you try to enter a
41st step, the calculator dispalys E. Press [ ON/C ] to clear the error.
To stop storing a program, press [ 2ndF ] [ PGM ] again. PGM
disappears and the calculator leaves the program mode. Press [ RUN ]
to begin repeating the same mathematical procedure with different
variables.
When you press [ RUN ], you can begin entering different variables.
Just enter each variable in the order in which it occurs in the formula
and press [ RUN ] after each variable. The answers appears on the
display.
Stored programs are automatically erased when you press [ 2ndF ]
[ PGM ]. So, unless you want to enter a new program, do not select
the program mode.
You can program your calculator to give you interim values in your
formula also. While programming the calculation (in PGM mode),
press [ = ] when you reach the point where you want the interim value