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Samenvatting statistiek MTS2

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samenvatting van de volledige statistiekstof van het vak MTS2 aan de universiteit. Heel overzichtelijk en schematisch stap voor stap weergegeven.

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March 23, 2017
Number of pages
6
Written in
2015/2016
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Samenvatting MTS2: statistiek

ANOVA
*ANOVA gebruikt wanneer  te maken met 2 of meer groepen
(condities/levels), maar slechts met 1 OV

*Minimale meetniveau AV  interval/ratio

*Minimale meetniveau OV  nominaal/ordinaal

*F-ratio  hoe veel keer zo groot de tussenvariantie (MSbetween) is dan de
binnenvariantie (MSwithin)

*Resultaat is significant:
 Wanneer F > Fkritiek
 Wanneer p (= overschrijdingskans) < α
 Wanneer 0 niet tussen onder- en bovengrens van
betrouwbaarheidsinterval voorkomt

*Post hoc toets  past betrouwbaarheidsniveau van individuele interval aan,
zodat totale betrouwbaarheidsniveau op 95% blijft
 Gebruiken  wanneer er meer dan 2 condities zijn

*Bij F-tabel (om Fkritiek te bepalen):
 Numerator = teller  dfbetween
 Denominater = noemer  dfwithin

*Wanneer verschil tussen steekproefgemiddelden toeneemt:
 Teller van F-ratio (MSbetween) wordt groter  F wordt groter

*Wanneer steekproefvarianties (MS) toenemen:
 Noemer van F-ratio (MSwithin) wordt groter  F wordt kleiner

*Effectgrootte  η²

*Richtlijnen van Cohen:
 η² = 0.01  klein effect
 η² = 0.09  medium effect
 η² = 0.25  groot effect

*ANOVA voor 2 groepen gebruiken  zelf weten of je t-toets voor 2
onafhankelijke groepen of dat je ANOVA gebruikt:
 F = t²

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