Statistics
σx
[
∑
[
y
=
-------
Q
Sx
=
Sy
=
(
[
∑
[
∑
–
--------------
Q
=
------------------------------ -
Q
∑
r
=
--------------------------------------------------------------------------- -
(
2
x
∑
–
------------- -
∑
m
=
------------------------------- -
∑
b
y mx
x ˆ
=
–
y
∑
∑
[
=
------ -
=
--------- -
Q
∑
2
(
)
[
∑
[
∑
–
--------------
Q
------------------------------ -
Q
–
2
(
y
)
∑
y
∑
–
------------- -
Q
----------------------------- -
Q
–
2
)
y
∑
σy
=
----------------------------- -
x
y
∑
∑
xy
–
-------------- -
n
2
x
)
(
∑
∑
2
y
∑
–
------------- -
n
x
y
∑
∑
xy
–
-------------- -
n
2
(
x
)
∑
2
x
–
------------- -
n
y b
–
y ˆ
mx
=
---------- -
=
m
B: More About Calculations 135
[\
\
2
(
y
)
∑
–
------------- -
Q
Q
2
y
)
n
b
+