Case
Case uitwerking BBS1003 Statistics
- Course
- Institution
Case of 4 pages for the course BBS1003 Statistics at UM (.)
[Show more]
Seller
Follow
summa2023
Content preview
Faculty of Health, Medicine and Life Sciences1.1.1 Seminar 4.2 assignments
Don’t forget watching the videos!
All relevant statistical concepts have been discussed earlier, but repeating the discussion of
several concepts is always good. In this seminar cross table analysis is combined with
statistical testing
Problem 1
The p-value as obtained in the chi-square test for a contingency table expresses:
a. how likely it is to obtain the observed chi-square value or an even larger value if there
is no relation between the row and column variable
b. how likely it is to obtain the observed chi-square value or an even smaller value if
there is no relation between the row and column variable
c. how likely it is to obtain the observed chi-square value or an even larger value if there
is a relation between the row and column variable
d. how likely it is to obtain the observed chi-square value or an even smaller value if
there is a relation between the row and column variable
Answer:
It tests the null-hypothesis so no relation between the row and column variable since they are
independent from each other. The observed chi square moves left or right in the chi-square
distribution.
Problem 2
If the p-value of the chi-square test for a contingency table is below the significance level alfa,
our conclusion is that:
a. there is no relation between the row and column variable
b. there is a very strong relation between the row and column variable
c. there is a negative relation between the row and column variable
d. there is a relation between the row and column variable.
Answer:
If the p-value of the chi-square test for a contingency table is below the significance level alfa: it
means that the null hypothesis will be rejected since evidence against it will be strong. The null
hypothesis indicates that there is no relationship. The alternative hypothesis will be accepted
which indicates a relationship.
Problem 3
Suppose the p-value of the chi-square test for a 2x2 contingency table is below the
significance level alfa = 0.10. Which interpretation is most correct?
a. there is enough counterevidence against the null hypothesis, so we reject it
b. there is enough counterevidence against the alternative hypothesis, so we reject it
c. the probability of the null hypothesis being true is below 10%, so we reject it
d. the probability of the alternative hypothesis being true is below 10%, so we reject it
Answer:
A p-value below the significance level alpha means that there is strong evidence against the
null hypothesis.
Problem 4
BBS1003 Syllabus 2020-2021 202020
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 summa2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.96. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
50843 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now