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5. Stichproben und Statistiken

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5. Stichproben und Statistiken

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April 16, 2023
Number of pages
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Written in
2022/2023
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5. Stichproben und Statistiken

Problem:

• Es sei X eine ZV, die einen interessierenden Zufallsvorgang
repräsentiere


• Man möchte die tatsächliche Verteilung von X kennenlernen
(z.B. mittels der VF FX (x) = P (X ≤ x))




291

,Man beachte:

• In praxi ist die Verteilung X zunächst unbekannt


Deshalb:

• Sammle Informationen über die unbekannte Verteilung des
Zufallsvorgangs, indem man diesen (und damit die ZV’e X)
mehrfach beobachtet

−→ Zufallsstichprobe



292

, 5.1 Zufallsstichprobe

Situation:

• Es sei X die ZV, die den interessierenden Zufallsvorgang
repräsentiere


• Man beabsichtigt, den Zufallsvorgang (d.h. X) insgesamt n-
mal beoachten


• Vor den Realisierungen kann man die n potenziellen Beobach-
tungen als ZV’en X1, . . . , Xn auffassen

293
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