Casio fx-3650P II User Manual page 35

11 (S-SUM) d1
2
x y
Obtains the sum of squares of the sample
x
-data multiplied by the sample
Σ x
2
11 (S-SUM) d3
4
x
Obtains the sum of the fourth power of the
x
sample -data.
Σ x
Mean and Standard Deviation Commands (VAR Menu)
12 (S-VAR) 1 (VAR) 1
¯ x
Obtains the mean of the sample
o
12 (S-VAR) 1 (VAR) 3
s
x
Obtains the sample standard deviation of
x
the sample -data.
s
=
x
σ
12 (S-VAR) 1 (VAR) e2
y
Obtains the population standard deviation
y
of the sample -data.
σ
=
y
Regression Coefficient and Estimated Value Commands for Non-
quadratic Regression (VAR Menu)
a
Obtains constant term a of the regression formula.
b
Obtains coefficient b of the regression formula.
y
-data.
Σ x
2
y y
=
i i
Σ x
4 4
=
i
x
-data.
Σ
x
i
=
n
Σ (x
– o)
2
i
n
– 1
Σ (y
– y) 2
i
n
3
x
Obtains the sum of cubes of the sample
x
-data.
σ
12 (S-VAR) 1 (VAR) 2
x
Obtains the population standard deviation
of the sample
σ
12 (S-VAR) 1 (VAR) e1
¯ y
Obtains the mean of the sample
12 (S-VAR) 1 (VAR) e3
s
y
Obtains the sample standard deviation of
y
the sample -data.
s
12 (S-VAR) 1 (VAR) ee1
12 (S-VAR) 1 (VAR) ee2
E-34
11 (S-SUM) d2
Σ x Σ x
3 3
=
i
x
-data.
Σ (x
– o)
2
= i
x
n
Σ y
i
p
=
n
Σ (y
2
– y)
i
=
y
n
– 1
y
-data.