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Comandi quando è selezionato il calcolo di
regressione quadratica (_+CX
2
)
Con la regressione quadratica, la regressione viene eseguita in
conformità al seguente modello di equazione.
y = A + BX + CX
2
Per informazioni riguardo la formula di calcolo usata per ciascun
comando, vedere Appendice <#051>.
Sottomenu Reg (11(STAT)7(Reg))
Selezionare
Quando si desidera ottenere questo:
questa voce di
menu:
1A
Termine A della costante del coefficiente di
regressione
2B
Coefficiente lineare B dei coefficienti di
regressione
3C
Coefficiente quadratico C dei coefficienti di
regressione
4m1 Valore stimato di x1
5m2 Valore stimato di x2
6n Valore stimato di y
Le operazioni di sottomenu Sum (somme), sottomenu Var (numero
di campioni, media, deviazione standard), e sottomenu MinMax
(valore massimo, valore minimo), sono le stesse di quelle eseguite
per i calcoli di regressione lineare.
Appendice Calcolo di regressione quadratica:
Da <#052> a <#054>
•Tutti gli esempi da <#052> a <#054> usano i dati introdotti in
Esempio <#047>.
Commenti per altri tipi di regressione
Per dettagli riguardo la formula di calcolo del comando inclusa in
ciascun tipo di regressione, riferirsi alle formule di calcolo indicate
( Appendice da <#055> a <#059>).
43


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