Statistical Calculations; Standard Deviation - Casio FX-820MS User Manual

Statistical
Calculations

Standard Deviation

F
Use the
to perform statistical calculations using standard de-
viation.
SD ...................................................................
• Always start data input with
statistical memory.
• Input data using the key sequence shown below.
S
x
< -data>
• Input data is used to calculate values for
σ σ
and
n n-
tions noted nearby.
To recall this type of value:
• Example: To calculate
the following data : 55, 54, 51, 55, 53, 53, 54, 52
In the SD Mode:
A B 1
Sample Standard Deviation (
Population Standard Deviation (
key to enter the SD Mode when you want
, which you can recall using the key opera-
1
Σx
2
Σx
n
o
σ
n
σ
n-
1
=
(Scl) (Stat clear)
Each time you press
σ
n
σ
A B 1
Perform this key operation:
A U 1
A U 2
A U 3
A X 1
A X 2
A X 3
σ σ
, ,
n n
1
S
55
the number of data input up to that point is
indicated on the display (
53
) = 1.407885953
1
n) = 1.316956719
E-22
=
(Scl)
Σx
n
,
Σx
o
n
, , , and
SD
n=
S
to register your input,
S S
54 51
S S S
54
A X 3 =
A X 2 =
SD
REG
SD
F 2
to clear
Σx
o
2
, , ,
Σx
2
for
1.
n
value).
S
55
S
52