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Summary

Samenvatting Analyse en Interpretatie Blok B

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Samenvatting Analyse en Interpretatie geschreven aan de hand van de hoorcolleges.

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Uploaded on
January 10, 2021
Number of pages
19
Written in
2020/2021
Type
Summary

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Analyse en Interpretatie
Spreidingsmaten
Boxplot




Variantie – gemiddelde gekwadrateerde afwijking van het gemiddelde
- Bruikbaar bij meetniveau’s interval of ratio
- Zegt iet over de afstand van alle waarnemingen t.o.v. gemiddeld
- Uitgedrukt in 1 getal

Formule populatievariantie:

Let op: variantie is σ2 en niet σ!


σ2 (sigma2)= populatie variantie
N= het aantal mensen die zich in de populatie bevindt.
Σ = hoofdletter sigma. De som die wij moeten bepalen van de rekenkundige bewerking die erna staat.
X= een meting
i= het nummer die we aan de meting hebben gegeven
U= populatie gemiddelde




Gemiddelde= eindcijfers opstellen
: aantal studenten

(x-u)= eindcijfer – gemiddelde)

Som is alles opgeteld van die rij.

(x-u2)= (x-u) x (x-u)
Dus -1,833 x -1,833 = 3,361

Delen door 12 is hetzelfde als
vermenigvuldigen met 1:12

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