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I-21
•Regressione lineare
La formula di regressione per la regressione lineare è:
y ҃ A ѿ Bx.
Esempio: Pressione atmosferica contro temperatura
Eseguire la regressione lineare
per determinare i termini e il
coefficiente di correlazione della
formula di regressione per i dati
indicati qui accanto. Quindi, usare
la formula di regressione per
stimare la pressione atmosferica
a 18°C e la temperatura a 1000
hPa.
Entrare nel modo REG (regressione lineare).
fx-85W:
q q 2 1
Altri modelli: q 3 1
A m = (Cancellazione della memoria)
10
P 1003 S 15 P 1005 S
20 P 1010 S 25 P 1011 S
30 P 1014 S
(Coefficiente di regressione A) A q =
(Coefficiente di regressione B) A w =
(Coefficiente di correlazione
r) A J =
(Pressione atmosferica a 18°C) 18 A b
(Temperatura a 1000 hPa) 1000 A O
•Regressione quadratica
La formula di regressione per la regressione quadratica
è:
y = A + Bx +Cx
2
.
•Introdurre i dati usando la seguente sequenza di tasto.
<dato
x> P <dato y> S
Temperatura
Pressione
atmosferica
10°C 1003 hPa
15°C 1005 hPa
20°C 1010 hPa
25°C 1011 hPa
30°C 1014 hPa
30.
00
REG
1007.48
00
4.642857143
00
997.4
00
0.56
00
0.982607368
00
23


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