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E-19
52.
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SD
1.407885953
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1.316956719
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53.375
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8.
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22805.
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427.
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Statistical Calculations
k Standard Deviation (SD Mode)
•Press F F 1 (fx-85W) to enter the SD Mode for sta-
tistical calculations using standard deviation. For other
models, press
F 2.
•Data input always starts with A m = to clear statisti-
cal memory.
•Input data is used to calculate values for
n, Σx, Σx
2
, o, σn and σn-1 which you can
recall using the key operations noted
nearby.
• Example: To calculate
σnҀ1, σn, o, n, Σx, and Σx
2
for the
following data : 55, 54, 51, 55, 53, 53, 54, 52
Enter SD Mode
fx-85W: F F 1
Other models: F 2
A m = (Memory Clear)
55
S 54 S 51 S 55 S
53 S S 54 S 52 S
(Sample Standard Deviation σnҀ1) A N =
(Population Standard Deviation σn) A A =
(Arithmetic Mean o) A M =
(Number of Data n) 0 k
(Sum of Values Σx) 0 H
(Sum of Squares of Values Σx
2
) 0 G
0 1 Σx
2
0 2 Σx
0 k n
A M o
A A σn
A N σn-1