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E-41
A
Deleting All Sample Data
Perform the following key operation to delete all sample data.
1
9
(CLR)
1
(Stat)
E
If you do not want to delete all sample data, press
A
in place of
E
in the above operation.
A
Statistical Calculations Using Input Sample Data
To perform a statistical calculation, input the applicable command and then press
E
. To
determine the mean (
o
) value of the current input sample data, for example, perform the
operation shown below.
1
2
(S-VAR)
1
E
* This is one example of possible calculation results.
A
SD Mode Statistical Command Reference
x xσn xσn–
1
12 3
x xσn xσn–
1
12 3
x
2533333333
x
2533333333
ƙ
x
2
1
1
(S-SUM)
1
Obtains the sum of squares of the sample
data.
Σ
x
2
=
Σ
x
i
2
ƙ
x
1
1
(S-SUM)
2
Obtains the sum of the sample data.
Σ
x
=
Σ
x
i
n
1
1
(S-SUM)
3
Obtains the number of samples.
n
= (number of
x
-data items)
¯ x
1
2
(S-VAR)
1
Obtains the mean.
o
Σx
i
n
=
x
σ
n
1
2
(S-VAR)
2
Obtains the population standard deviation.
x
σn
n
=
Σ(x
i
– o)
2
x
σ
n
–1
1
2
(S-VAR)
3
Obtains the sample standard deviation.
x
σn–1
n – 1
=
Σ(x
i
– o)
2
minX
1
2
(S-VAR)
e
1
Determines the minimum value of the
samples.
maxX
1
2
(S-VAR)
e
2
Determines the maximum value of the
samples.