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F-51
Commandes lorsque le calcul de régression
quadratique (_+CX
2
) est sélectionné
Lors d’une régression quadratique, la régression est calculée selon
l’équation suivante.
y
=
A
+
BX
+
CX
2
Voir Appendice <#065> pour le détail sur la formule de calcul
utilisée pour chaque commande.
Sous-menu Reg (11(STAT)7(Reg))
Sélectionnez
cet élément Pour obtenir ceci :
du menu :
1APente A de la droite de régression
2BConstante B de la droite de régression linéaire
3C
Constante C de la droite de régression
quadratique
4m1 Valeur estimée de x1
5m2 Valeur estimée de x2
6n Valeur estimée de y
Les opérations du sous-menu Sum (sommes), du sous-menu Var
(nombre de données, moyenne, écart-type) et du sous-menu
MinMax (valeur maximale, valeur minimale) sont identiques à celles
des calculs de régressions linéaires.
Appendice Calcul de régression quadratique : <#066> à <#068>
Les exemples <#066> à <#068> utilisent tous les données saisies
dans l’exemple <#061>.
A propos des autres types de régression
Pour le détail sur la formule de calcul de la commande incluse dans
chaque type de régression, reportez-vous aux formules de calcul
indiquées ( Appendice <#069> à <#073>).
Type de calcul statistique Equation
Formule
de calcul
Régression logarithmique
y = A + Bln X
<#069>
(ln X)
Régression exponentielle e
y
=
Ae
BX
<#070>
(e^X)
Régression exponentielle ab
y
=
AB
X
<#071>
(A•B^X)
Régression de puissance
y
=
AX
B
<#072>
(A•X^B)
Régression inverse (1/X)
y
=
A
+
X
B
<#073>
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