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Kapitel 7 Statistische Grafiken und Rechnungen
1234
Nachfolgend sind die Bedeutungen der obigen Parameter erläutert.
a ...... Zweiter Regressionskoeffizient
b ...... Erster Regressionskoeffizient
c ...... Regressions-Konstantenterm (y-Schnittpunkt)
kk
kk
k Logarithmische Regressions-Grafik
Die logarithmische Regression drückt y als eine logarithmische Funktion von x aus.
Die Standardformel für die logarithmische Regression lautet
y = a + b × logx, so
dass wir bei einer Annahme von X = log
x die Formel y = a + bX für die lineare
Regression erhalten.
[1(Log)
4(DRAW)
Nachfolgend sind die Bedeutungen der obigen Parameter erläutert.
a ...... Regressions-Konstantenterm
b ...... Regressionskoeffizient (Steigung)
r ...... Korrelationskoeffizient
kk
kk
k Exponentielle Regressions-Grafik
Die exponentielle Regression drückt y als einen Teil der exponentiellen Funktion von
x aus. Die Standardformel für die exponentielle Regression lautet y = a × e
bx
, so
dass wir log
y = loga + bx erhalten, wenn wir den Logarithmus von beiden Seiten
nehmen. Falls wir danach sagen Y = log
y und A = loga, dann entspricht die Formel
der Formel Y = A +
bx für die lineare Regression.
[2(Exp)
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