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Samenvatting colleges Toegepaste Statistiek 2 (FEB12005) $5.43   Add to cart

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Samenvatting colleges Toegepaste Statistiek 2 (FEB12005)

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Samenvatting / overzicht van de colleges van week 1 tot en met week 7.

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  • October 22, 2024
  • 14
  • 2024/2025
  • Summary
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1
hypothese testen

1
. formuleer de
vraag
2
collecting evidence (data) t Random, anders mogelyke bias

3 beslissen :
Verwerpen/niet verwerpen
Y conclusie in gewone woorden




E
population : de gehele groep mensen waarin we geinteresseerd
Zyn- > (griekse letters)

Sample : de specifieke groep geselecteerde mensen waarop de
conclusie gebaseerd is + latynse letters)



one sampled z lest

↳ normaal verdeling

voor
gegeven gemiddelde M en Standaarddeviatie 0, zyn er 2 Opties :




1.
I een normaal verdeling
2. een niet per se noormaa verdeling t groten is van belang



Distributiesamplemenu I
hypotheses testen :



1
.
gebruik Critiche waarde en het verwerpingsgebied
2 .
P-waarde testen



two types of error :

waarheid van population
Ho is waar Ho is niet waar

Decision based Verwerp Ho
on sample
Type I Error Juiste beslissing
VerwerpHo niet juiste beslissing Type I Error



Pltype I) a
3
=

>
-
we maximaliseren a-B1 =
power van de test)
D (type I) =
B




test -7
-
2
one sided




- -7
-
2
two sided test
12
ed


95 % confidence interval for M: Iz

, one sample t-test

zelfde als one sampled 2-test, maar je weet o niet

>
-
a kan benaderd worden door 'sample Standard error's


T = -
volg de t(n-1) distributie
-
dof



one sample t-test gebruiken als er geen outiers zijn , en :



·
er is een 'grote' n (n > 200
·
er is een gematigde n (20n(100) en kleine Scheefheid
·
er is een kleine n (n < 20) en de data is normaal verdeeld



Overzicht one sampled z- en one sampled t-test :




> spgs
-


geeft altyd een

t-value p-value p-value voor two sided test

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