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17740371
Diskretne slucajne spremenljivke
Description
Lastnosti diskretnih slucajnih spremenljivk
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diskretne spremenljivke
verjetnost
statistika
mathematics
Mind Map by
Aleksandra Franc
, updated more than 1 year ago
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Created by
Aleksandra Franc
over 5 years ago
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Resource summary
Diskretne slucajne spremenljivke
Binomska B(n,p)
X = st. uspelih poskusov pri n ponovitvah poskusa
p = verjetnost uspeha pri eni ponovitvi poskusa
E(X) = np
D(X) = np(1-p)
Geometrijska G(p)
X = st. poskusov, dokler se ne zgodi A
p = P(A)
E(X) = 1/p
D(X) = (1-p)/(p^2)
Pascalova P(n,p)
X = st. poskusov, dokler se A ne zgodi n-krat
p = P(A)
E(X) = n/p
D(X) = n(1-p)/(p^2)
Hipergeometrijska H(r,b,n)
X = st. rdecih kroglic med n izvlecenimi
r = st. rdecih kroglic v skatli
b = st. belih kroglic v skatli
E(X) = nr/(r+b)
D(X) = nrb(r+b-n)/)(r+b)^2(r+b-1))
Poissonova P(a)
X = st. ponovitev dogodka v predpisanem casovnem intervalu
a = frekvenca krat dolzina intervala
E(X) = 1/a
D(X) = a
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