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Samenvatting Hoorcollege 03

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Samenvatting hoorcollege 03 statistiek I, Vrije Universiteit Amsterdam.

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HC 03
Herhaling vorige week:

- Tabellen en grafeken:
o Frequenteverdeling Frequency distributon
o Staafdiagram Bar graph
o Histogram Histogram
o Steel-en-blad diagram Stem-and-leaf plot
o Boxplot Box plot
- Centrummaten Measures of Center
o Gemiddelde Mean
o Mediaan Median
o Modus Mode
- Spreidingsmaten Measures of Variability:
o Range Bereik
o Interquartle range Interkwartelafstand
o Variance and Standard deviaton Variante en standaarddeviate
- Positematen Measures of Positon:
o Percentlesand Quartles Percentelen en kwartelen

Hoofdstuk 4

P(A): kan dat de uitkomst A plaatsvindt
P(niet A) = 1 – P(A): kans dat de uitkomst A niet plaatsvindt
P(A of B) = P(A) + P(B): Kans dat A of B plaatsvinden
P(A en B) = P(A) x P(B gegeven A): kans dat de uitkomst A en B plaatsvinden
P(A en B) = P(A) x P(B): wanneer A en B onafankelijke gebeurtenissen zijn

Discreet en contnue kansverdeling

- Discrete variabelen hebben een beperkte set aan mogelijke waarde:
o De kans voor elke van deze aparte waarden kan berekend worden
o V: Wat is het ideale aantal kinderen?
- Contnue variabelen hebben een oneindig aantal mogelijke waarden:
o De kans intervallen van waarden kan berekend worden.
o V: Wat is de gemiddelde reistjd naar werk? (tot aan nanoseconden meetbaar)

Er staan drie verdelingen centraal in de statstek de populateverdeling, steekproefverdeling en
steekproevenverdeling:

Steekproevenverdeling ≠ steekproefverdeling

- Populateverdeling (populaton distruuuton)
o Een kans-/ of frequenteverdeling van de verschillende
uitkomstmogelijkheden van een variabele, zoals deze in
de totale populate wordt waargenomen.
 Gemiddelde μ
 Standaarddeviate σ
 Omvang N (# waarnemingen in populate)

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Written in
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