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E-44
1
2
(S-VAR)
1
(VAR)
e
1
E
* This is one example of possible calculation results.
A
REG Mode Statistical Command Reference
Sum and Number of Sample Command (S-SUM Menu)
y
y
σn
y
σn–
1
12 3
y
y
σn
y
σn–
1
12 3
y
14
y
14
ƙ
x
2
1
1
(S-SUM)
1
Obtains the sum of squares of the sample
x
-data.
Σ
x
2
=
Σ
x
i
2
ƙ
x
1
1
(S-SUM)
2
Obtains the sum of the sample
x
-data.
Σ
x
=
Σ
x
i
n
1
1
(S-SUM)
3
Obtains the number of samples.
n
= (number of
x
-data items)
ƙ
y
2
1
1
(S-SUM)
e
1
Obtains the sum of squares of the sample
y
-data.
Σ
y
2
=
Σ
y
i
2
ƙ
y
1
1
(S-SUM)
e
2
Obtains the sum of the sample
y
-data.
Σ
y
=
Σ
y
i
ƙ
xy
1
1
(S-SUM)
e
3
Obtains the sum of products of the sample
x
-data and
y
-data.
Σ
xy
=
Σ
x
i
y
i
ƙ
x
2
y
1
1
(S-SUM)
d
1
Obtains the sum of squares of the sample
x
-data multiplied by the sample
y
-data.
Σ
x
2
y
=
Σ
x
i
2
y
i
ƙ
x
3
1
1
(S-SUM)
d
2
Obtains the sum of cubes of the sample
x
-data.
Σ
x
3
=
Σ
x
i
3
ƙ
x
4
1
1
(S-SUM)
d
3
Obtains the sum of the fourth power of the
sample
x
-data.
Σ
x
4
=
Σ
x
i
4
Mean and Standard Deviation Commands (VAR Menu)
¯ x
1
2
(S-VAR)
1
(VAR)
1
Obtains the mean of the sample
x
-data.
o
Σx
i
n
=
o
Σx
i
n
=
x
σ
n
1
2
(S-VAR)
1
(VAR)
2
Obtains the population standard deviation
of the sample
x
-data.
x
σn
n
=
Σ(x
i
– o)
2
x
σn
n
=
Σ(x
i
– o)
2