Casio fx-50F User Manual page 42

A Deleting All Sample Data
Perform the following key operation to delete all sample data.
9 (CLR) 1 (Stat)
If you do not want to delete all sample data, press A in place of
A Statistical Calculations Using Input Sample Data
To perform a statistical calculation, input the applicable command and then press
determine the mean ( ) value of the current input sample data, for example, perform the
operation shown below.
A SD Mode Statistical Command Reference
x
2
Obtains the sum of squares of the sample
data.
Σ x
x
Obtains the sum of the sample data.
Σ x
n
Obtains the number of samples.
n
= (number of
¯ x
Obtains the mean.
1 (S-SUM) 1
Σ x
2
2
=
i
1 (S-SUM) 2
Σ x
=
i
1 (S-SUM) 3
x
-data items)
2 (S-VAR) 1
Σ
x
i
=
n
2 (S-VAR)
1
* This is one example of possible calculation results.
σ
x
n
Obtains the population standard deviation.
x
σ
x
n
–1
Obtains the sample standard deviation.
σ
x
minX
Determines the minimum value of the
samples.
maxX
Determines the maximum value of the
samples.
E-41
in the above operation.
x xσn xσn x xσn xσn
1 2 1 2
x x
2533333333 2533333333
2 (S-VAR) 2
Σ (x
2
– )
σ
i
=
n
n
2 (S-VAR) 3
Σ (x
– ) 2
i
=
n
–1
n
– 1
2 (S-VAR)
2 (S-VAR)
. To
–1 –1
3 3
1
2