Statistica per l'impresa - Formulario standard
Formule statistica descrittiva
x=
n
P
i=1
xi
nx=
K
P
j=1
xjnj
nx=
K
P
j=1
cjnj
n
σ2=
n
P
i=1
(xi−x)2
nσ2=
K
P
j=1
(xj−x)2nj
nσ2=
K
P
j=1
(cj−x)2nj
n
CV =σ
x×100
E1= 1 −
K
P
j=1
f2
je1=K
K−1·E1
range =x(max)−x(min)dQ =Q3−Q1
R=
n−1
P
i=1
(Fi−Qi)
n−1
P
i=1
Fi
R= 1 −
K−1
P
j=0
(Fj+1 −Fj)(Qj+1 +Qj)
β=
n
P
i=1
(xi−x)3
nσ3β=
K
P
j=1
(xj−x)3nj
nσ3β=
K
P
j=1
(cj−x)3nj
nσ3
χ2=
H
P
i=1
K
P
j=1
nij−n0
ij2
n0
ij
V=qχ2/n
min(H−1;K−1)
σxy =
n
P
i=1
(xi−x)(yi−y)
nρxy =σxy
σxσy
b
β1=σxy
σ2
xb
β0=y−b
β1x
R2=
n
P
i=1
(ˆyi−y)2
n
P
i=1
(yi−y)2=b
β2
1
·
n
P
i=1
(xi−x)2
n
P
i=1
(yi−y)2= 1 −
n
P
i=1
(yi−ˆyi)2
n
P
i=1
(yi−y)2=ρ2
xy
pIL
t/0
=
M
P
m=1
pmtqm0
M
P
m=1
pm0qm0
pIP
t/0=
M
P
m=1
pmtqmt
M
P
m=1
pm0qmt
qIL
t/0
=
M
P
m=1
pm0qmt
M
P
m=1
pm0qm0
qIP
t/0=
M
P
m=1
pmtqmt
M
P
m=1
pmtqm0
1
