Correlatie Analyse 20
9 Hypothese test voor correlatie 20
10 Oefenopgaven 20
2
, One Population Hypothesis Testing
Toetsen voor µ en p behoren tot Mid-term.
1 Hypothesis Test of one Population Variance
Test-statistiek:
(n − 1)s2
χ2 =
σ2
U
heeft een chi-kwadraat verdeling met n − 1 vrijheidsgraden.
Nodig: normaal verdeelde populatie
Voorbeeld: Beschouw de info over ’Happy Days’ op blz ... Test de claim dat de populatie
variantie van vroeger kleiner is dan 26. Neem een significantie van 1%.
χ2n−1;α = χ239;0.99 = 22.164
AT
(3) Test-statistiek:
(n − 1)s2
χ2 =
σ2
(4) Verwerpings gebied: Test-stat < 22.164
(5)
39 · 52
χ2 = = 37.5
ST
26
(6) χ2 > Kritieke waarde → verwerp H0 niet.
(7) Er is geen bewijs dat variantie vroeger kleiner was dan 26.
Two Populations Hypothesis Testing
2 Difference between Two (Normal Population) Means: µ1
and µ2
2.1 Dependent Samples → One Sample Test
Voorbeeld: In 8 filialen (A, B, ..., H) van een supermarktketen is het aantal verkochte pakken
waspoeder op een dag vlak voor en op een dag vlak na een reclamecampagne geregistreerd. De
resultaten en enige bijbehorende rekenuitkomsten zijn:
3
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Swarleyy. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.11. You're not tied to anything after your purchase.
