Mathe Lage und Streumasse + Vektoren Flashcards

1
Q

Was ist der Median?

A

das robuste Mass

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2
Q

berechnung Median, bei n ungerade

A

X~((n+1)/2)

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3
Q

berechnung Median, bei n gerade

A

1/2(x~(n/2) + x~(n/2 + 1))

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4
Q

was ist der Modus?

A

modus beschreibt die am stärksten vertrettene Gruppe

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5
Q

Wie berechnet man die Spannweite R?

A

x~max - x~min

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6
Q

Was sind beispiele für Quartile?

A

Q~0.25, Q~0.5, Q~0.75

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7
Q

Was sind beispiele für Quintile?

A

Q~0.2, Q~0.4, Q~0.6, Q~0.8

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8
Q

Was sind beispiele für Dezile?

A

Q~0.1, Q~0.2, Q~0.3, Q~0.4, Q~0.5, …

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9
Q

Was sind Perzentile?

A

Q~0.01, Q~0.02, Q~0.03, …

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10
Q

wie berechnet man die Quantile bei einem nicht ganzzahligen n*p-Wert?

A

~x~(p) = x~([n*p])

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11
Q

wie berechnet man die Quantile bei einem ganzzahligen n*p-Wert?

A

~x~(p) = 1/2 * (x~(np) + x~(np+1)

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12
Q

Wann sind Vektoren gleich?

A

bei gleicher Richtung und Betrag

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13
Q

Was sind Vektoren?

A

Befele

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14
Q

Was ist mit Vektoren unmöglich?

A

Etwas durch einen Vektor teilen

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15
Q

Wann spielt die Richtung der Vektoren keine rolle mehr?

A

bei Beträgen

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