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Zusammenfassung Lernzettel Statistik 1

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Umfasst folgende Themen: - Deskriptive Statistik - ⁠Korrelationsmaße - ⁠Binominalverteilung Geschrieben in GoodNotes auf A3. Umfasst 3 Seiten.

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Inferenzstatistik : Schluss von erhobenen Daten einer Stichprobe
auf Analyse der statistischen Eigenschaften
Werte in
Population von Datenmengen




statistische Methoden einteilen




,
endlich




in Intervall
,




&
=

·

>
-




&



g




D









39. 700 + 45 000
.




2




Range ,
Varianz Stand ., IQR


Normalverteilung
,




Stichprobe Grundgesamtheit

Mittelwert
x =
M
durch und Standardabweichung gekennzeichnet S= o


symmetrische Verteilung um
M

Median , Modus Mittelwert
, gleich

glockenförmig


M
BSP .




Prozentwert


wie stark um Mittelwert streuer Standardabweichung
68 % Bereich 1




*
9) 5 % Bereich 2 Standardabweichungen

.9
9 ,
7 % Bereich 3 Standardabweichungen


D e dimensionslos



besonders Vergleich Streuung von Stichproben mit

verschieden großen Mittelwerten
z Wert
gibt an wie viele Standardabweichungen bestimmter Wert rechts oder links vom Mittelwert der Bezugsgruppe liegt


ert
Standardnormalverteilung Normalverteilungen in Standardnormalverteilung
Mittelwert F überführen mit z-Transformation
=
0


Standardabweichung s=1 (Xi -
X)
X +
z = Xi =
2 .

S
S



Verteilung wird
gestreckt gestaucht
g2 Verändert nicht Form der Verteilung

macht Werte vergleichbar




.
6


#



einer Stichprobe wie weit um Mittelwert streuen Bsp .




Michael6 ,SMin Konzentrationson Z



Konzentrationsleistung normalverteilt
-033
Michael 0, 6
Standardabweichungen unter Durchschnitt

Julia 1 ,
33 Standardabweichungen unter Durchschnitt

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