Operation Manual

B: Calculs supplémentaires 145
Statistiques
 


[
[
∑
Q
-------=
y
y
∑
Q
-------=
[
[\
∑
\
∑
----------=
Sx
[
∑
[
∑
()
2
Q
--------------
–
Q 
–
-------------------------------
=
Sy
y
∑
y
∑
()
2
Q
--------------
–
Q 
–
------------------------------
=
σx
[
∑
[
∑
()
2
Q
--------------
–
Q
-------------------------------
=
σy
y
∑
y
∑
()
2
Q
--------------
–
Q
------------------------------
=
r
xy
∑
x
∑
y
∑
n
---------------
–
x
2
∑
x
∑
()
2
n
--------------
–


y
2
∑
y
∑
()
2
n
--------------
–


----------------------------------------------------------------------------
=
m
xy
∑
x
∑
y
∑
n
---------------
–
x
2
∑
x
∑
()
2
n
--------------
–
--------------------------------
=
bymx–=
x
ˆ
yb–
m
-----------
=
y
ˆ
mx b+=
appendix_B.fm Page 145 Sunday, June 25, 2000 2:50 PM