HP Calcolatrice business HP 10bII - Manuale (Pagina 135)

B: Altre informazioni sui calcoli 135
Statistiche
, , x
x ∑
n
----- = y
y ∑
n
----- = x
w
xy ∑
y ∑
-------- =
Sx
x
2
∑
x ∑ ( ) 2
n
------------ –
n 1 –
--------------------------- =
Sy
y 2
∑
y ∑ ( )
2
n
------------
–
n 1 –
-------------------------- =
σx
x
2
∑
x ∑ ( )
2
n
------------
–
n
---------------------------
=
σy
y 2
∑
y ∑ ( )
2
n
------------
–
n
--------------------------
=
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
------------ –
--------------------------
=
b y mx
– =
xˆ
y b –
m
-----------
=
yˆ mx b
+ =
10B-050523-1.book Page 135 Friday, September 1, 2006 2:32 PM