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I-22
•Esempio:
Eseguire la regressione quadratica
per determinare i termini e il
coefficiente di correlazione della for-
mula di regressione per i dati indicati
qui accanto. Quindi, usare la formula
di regressione per stimare i valori per
ˆy (valore stimato di y) per xi = 16 e
per
ˆx (valore stimato di x) per yi = 20.
Entrare nel modo REG (regressione quadratica).
fx-85W:
F F 2 r 3
Altri modelli: q 3 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
(Coefficiente di regressione A) A q =
-
35.59856934
(Coefficiente di regressione B) A w =
1.495939413
(Coefficiente di regressione C) A e =
-
6.71629667
-
0
3
(ˆy quando xi = 16) 16 A b
-
13.38291067
(ˆx
1
quando yi = 20) 20 A O
47.14556728
(ˆx
2
quando yi = 20) A O
175.5872105
Precauzioni per l’introduzione dei dati
S S introduce lo stesso dato due volte.
•È possibile introdurre più volte lo stesso dato anche
usando
A G. Ad esempio, per introdurre il dato “20 e
30” cinque volte, premere 20
P 30 A G 5 S.
•I risultati sopra indicati possono essere ottenuti in qualsiasi
ordine, e non necessariamente nell’ordine sopra indicato.
•Per cancellare il dato appena introdotto, premere
A
U.
x
i
y
i
29 1,6
50 23,5
74 38,0
103 46,4
118 48,0
24


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