Statistical calculations, K standard deviation (sd mode) – Casio fx-85WA User Manual
Page 21
E-19
52.
00
SD
1.407885953
00
1.316956719
00
53.375
00
8.
00
22805.
00
427.
00
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
,
σ
n
and
σ
n
-
1
which you can
recall using the key operations noted
nearby.
• Example: To calculate
σ
n
Ҁ
1
,
σ
n
,
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
σ
n
Ҁ
1
)
A
N
=
(Population Standard Deviation
σ
n
)
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 σ
n
A
N σ
n
-
1