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E-117
A Commands when Linear Regression
Calculation (A+BX) Is Selected
With linear regression, regression is performed in
accordance with the following model equation.
y = A + BX
The following are the commands that appear on the sub-
menus that appear when you select 4(Sum), 5(Var),
6(MinMax), or 7(Reg) on the STAT menu while linear
regression is selected as the statistical calculation type.
Calculation formula used for each command
A =
n
Σy – B
.
Σx
o
Σ
x
n
=
m
y – A
B
=
x
σ
n
n
=
Σ
(x – o)
2
xσ
n –1
n – 1
=
Σ
(x – o)
2
p
Σ
y
n
=
y
σ
n
n
=
Σ
(y – p)
2
yσ
n –1
n – 1
=
Σ
(y – p)
2
B =
n
.
Σx
2
–
(
Σx
)
2
n
.
Σxy – Σx
.
Σy
r
=
{
n
.
Σx
2
–
(
Σx
)
2
}{
n
.
Σy
2
–
(
Σy
)
2
}
n
.
Σxy – Σx
.
Σy
n = A + Bx