N= o σ, A reg mode statistical command reference, Ƙ xy – Casio fx-50F PLUS User Manual
Page 45: Σ xy
E-44
12(S-VAR) 1(VAR) e
1E
* 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
1 2
3
y
y
σn
y
σn
–1
1 2
3
y
14
y
14
ƙx
2
11(S-SUM)1
Obtains the sum of squares of the sample
x
-data.
Σ x
2
=
Σ x
i
2
ƙx
11(S-SUM)2
Obtains the sum of the sample
x
-data.
Σ x
=
Σ x
i
n
11(S-SUM)3
Obtains the number of samples.
n
= (number of
x
-data items)
ƙy
2
11(S-SUM)e1
Obtains the sum of squares of the sample
y
-data.
Σ y
2
=
Σ y
i
2
ƙy
11(S-SUM)e2
Obtains the sum of the sample
y
-data.
Σ y
=
Σ y
i
ƙxy
11(S-SUM)e3
Obtains the sum of products of the sample
x
-data and
y
-data.
Σ xy
=
Σ x
i
y
i
ƙx
2
y
11(S-SUM)d1
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
ƙx
3
11(S-SUM)d2
Obtains the sum of cubes of the sample
x
-data.
Σ x
3
=
Σ x
i
3
ƙx
4
11(S-SUM)d3
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
12(S-VAR) 1(VAR) 1
Obtains the mean of the sample
x
-data.
o
Σ
x
i
n
=
o
Σ
x
i
n
=
x
σ
n
12(S-VAR) 1(VAR) 2
Obtains the population standard deviation
of the sample
x
-data.
x
σ
n
n
=
Σ(x
i
–
o)
2
x
σ
n
n
=
Σ(x
i
–
o)
2