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F-23
(Pression atmosphérique à 18°C) 18 A b
(Température à 1000 hPa) 1000 A O
•Régression quadratique
La formule de régression pour la régression quadratique
est:
y = A + Bx +Cx
2
.
•Saisissez les données en utilisant la séquence de
touches suivantes.
<donnée
x> P <donnée y> S
Exemple:
Effectuez une régression quadratique
pour déterminer les termes de la
formule de régression et le coefficient
de corrélation pour les données ci-
contre. Utilisez ensuite la formule de
régression pour estimer les valeurs de
ˆy (valeur estimée de y) pour xi = 16 et
ˆx (valeur estimée de x) pour yi = 20.
Entrez dans le mode REG (Régression quadratique)
F F 2 r 3
A m =
29 P 1.6 S 50 P 23.5 S
74 P 38.0 S103 P 46.4 S
118 P 48.0 S
118.
REG
(Coefficient de régression A) A q =
-
35.59856934
(Coefficient de régression B) A w =
1.495939413
(Coefficient de régression C) A e =
-
6.71629667
-
0
3
(ˆy quand xi = 16) 16 A b
-
13.38291067
(ˆx
1
quand yi = 20) 20 A O
47.14556728
(ˆx
2
quand yi = 20) A O
175.5872105
1007.48
00
4.642857143
00
x
i
y
i
29 1,6
50 23,5
74 38,0
103 46,4
118 48,0
25


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