INDICI Flashcards

1
Q

CHI QUADRO

A

nullo se x e y indipendenti

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Cramer V

A

0= indipendenza statistica;
1=dipendenza

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Covarianza

A

nullo= indipendenza statistica;
>0= se x e y concordi;
<0= se x e y discordi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

coefficiente di corr. lineare

A

1= se x funz. lineare di y;
-1= se x funz. lineare negativa di y;
nulla= no corr. tra x e y

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

eta squared

A

0= indipendenza in media
>0= dipendenza in media (>0,04);
1= massima dipendenza in media

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Test f

A

significatività congiunta coeff:
se p-value < ok

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

R2

A

significatività congiunta coeff.
0= no esplicativo
1= spiega perfetto
>0,2-0,3= buono

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

R2 adjusted

A

significatività congiunta coeff.
varia tra 0 - 1
ok >0,2-0,3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

test t

A

bontà singoli regressori:
se p-value piccolo –> regressore esplicativo

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

RJ2

A

X multicollinearità:
>0,2 , 0,3 = si multi.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

VIFJ

A

X multicollinearità:

> 1,2 - 1,3 = Si multi.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Campo variazione

A

max-min

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

differenza interquartile

A

Q3-Q1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Varianza

A

somma dei quadrati delle differenze tra osservazione e media

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

scarto quadratico medio

A

variabilità rispetto alla media

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

coefficiente di variazione

A

variabilità relativa, sempre in %

17
Q

skewness

A

y=0 simmetria
y>0= assimmetria positiva
y<0=assimmetria negativa

18
Q

kurtosis

A

b=3 distr. normale
b>3= distr. ipernormale
b<3= distr. iponormale

19
Q

Likelihhod ratio test / score test / Wald test

A

significatività modello logistico:
ok p-value con valori piccoli

20
Q

Wald Chi-square:

A

signific. singoli coeff.
ok se p-value piccolo