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F-21
•Régression linéaire
La formule de régression linéaire est y ҃ A ѿ Bx.
Exemple: Pression atmosphérique par rapport à la
température
Effectuez une régression linéaire
pour déterminer les termes de la
formule de régression et le coeffi-
cient de corrélation pour les
données indiquées ci-contre.
Utilisez ensuite la formule de
régression pour calculer la
pression atmosphérique à 18°C et
la température à 1000 hPa.
Entrez dans le mode REG (Régression linéaire)
fx-85W:
q q 2 1
Autres modèles:
q 3 1
A m = (effacement de mémoire)
10
P 1003 S 15 P 1005 S
20 P 1010 S 25 P 1011 S
30 P 1014 S
(Coefficient de régression A) A q =
(Coefficient de régression B) A w =
(Coefficient de corrélation r) A J =
(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
Température
Pression
atmosphérique
10°C 1003 hPa
15°C 1005 hPa
20°C 1010 hPa
25°C 1011 hPa
30°C 1014 hPa
1007.48
00
4.642857143
00
30.
00
997.4
00
0.56
00
REG
0.982607368
00
23


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