User's Guide

Using Calculation Modes
Statistical Calculations (SD, REG*)
* fx-82MS/fx-85MS/fx-300MS/
fx-350MS only
Standard Deviation (SD)
Use the key to enter the SD Mode when you want to perform
statistical calculations using standard deviation.
(SD)
• In the SD Mode and REG Mode, the key operates as the key.
• fx-82MS/fx-85MS/fx-300MS/fx-350MS: Always start data input with
(CLR) (Scl) to clear statistical memory.
fx-220 PLUS: Always start data input with (Scl) to clear
statistical memory
.
• Input data using the key sequence shown below.
< x -data>
• Input data is used to calculate values for n , Σ x , Σ x
2
, x
-
, σ
n
and s
x
,
which you can recall using the key operations noted nearby
.
To recall
this type
of
value:
Perform this key operation:
fx-82MS/fx-85MS/
fx-300MS/fx-350MS
fx-220 PLUS
Σ x
2
(S-SUM) (Σ x
2
) (Σ x
2
)
Σ x (S-SUM) (Σ x ) (Σ x )
n (S-SUM) ( n ) ( n )
x
-
(S-VAR) ( x
-
) ( x
-
)
σ
x
(S-VAR) ( σ
x
) ( σ
x
)
s
x
(S-VAR) (s
x
) (s
x
)
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