492879
16
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16
10 1003 15 1005
20 1010 25 1011
30 1014
(regressiecoëfficiënt A)
(regressiecoëfficiënt B)
(correlatiecoëfficiënt r)
(luchtdruk bij 18 °C)
18
(temperatuur bij 1000 hPa)
1000
Kwadratische regressie
D De regressieformule voor de kwadratische regressie luidt:
y = A+Bx+Cx
2
D Voer de gegevens in met de volgende toetsenreeks.
<×−gegevens>
<y−gegevens>
D Voorbeeld:
xi
yi
29 1.6
50 23.5
74 38.0
103 46.4
118 48.0
Schakel de REG−modus in (kwadratische regressie)
Geheugen wissen:
29 1.6 50 23.5
74 38.0 103 46.4
118 48.0
(regressiecoëfficiënt A)
(regressiecoëfficiënt B)
(regressiecoëfficiënt C)
(t als xi = 16)
16
30.
REG..............
997.4
0.56
0.982607368
1007.48
4.642857143
Voer de kwadratische regressie uit om de
voorwaarden voor de regressieformule en de
correlatiecoëfficiënt voor vergelijkbare gegevens
te bepalen. Gebruik de regressieformule
vervolgens om de waarden voor t (geschatte
y−waarde) voor xi = 16 en p (geschatte
x−waarde) voor yi = 20 te schatten.
118.
REG
–35.599856934
1.495939413
-6.71629667-
03
–13.38291067
16


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