Duidelijk overzicht van de leerdoelen van statistiek. De formules en theorie worden uitgelegd. Deze samenvatting in combinatie met de kennisclips en de opdrachten is een goede voorbereiding op het tentamen.
Kans =probability (hoe waarschijnlijk is een bepaalde gebeurtenis)
p=Pr Pr {E} tussen de 0 en 1
Aantal dragers
Pr {drager} = ----------------------------------
Totaal aantal personen
Aantal keer dat E plaatsvindt
Pr {E} =------------------------------------------------------------------------
Aantal keer dat het kans proces heeft plaatsgevonden
Vermenigvuldigen van kansen
Pr {A en B} = Pr {A} x Pr {B}
Optellen van kansen
Pr {A of B} = Pr {A} + Pr {B}
Binomiale kansberekening
Binaire uitkomst : kans op successen of falen
Het aantal pogingen staat vast en is onafhankelijk
Elke poging heeft gelijke kans op succes
Pr {Y= J} = nCjpj ( 1-p)n-j
j= aantal succesen
p= kans op succes
n= aantal pogingen
nCj = binomiale coëfficiënt
n!
nCj = ------------ n!= nx (n-1) x (n-2)
j!(n-j)!
Gemiddelde discrete variabele
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