Exam (elaborations)
Biostatistics Final Exam Definitions UTA well answered to pass
- Course
- Institution
Biostatistics Final Exam Definitions UTA well answered to pass
[Show more]
Content preview
Biostatistics Final Exam Definitions UTAwell answered to pass
Bonferroni-Holm Multiple Comparisons - correct answer ✔✔-In the context of an ANOVA, rejecting the
null hypothesis means there is a statistical difference between at least two means, but it won't tell you
where it is. You use this to discover exactly which means are different.
-Only used for Model I ANOVAs
-A t-statistic for a two sample t-test assuming equal variance
Steps to Applying the Bonferroni-Holm Multiple Comparison Test - correct answer ✔✔Step 1: Calculate
test statistics and corresponding P values for each of the m comparisons
Step 2: Order the P values from smallest to largest: p1,p2,...,pm. Label the corresponding comparisons:
C1,C2,...Cm
Step 3: Compare p1 and alpha(a)/m
(a) If p1 > a/m, then stop. Conclude that there is no evidence of differences between any of the means.
Procedure is done
(b) p1 < or = a/m, then reject Ho for C1. Continue to next step.
Step 4: Compare p2 and a/(m-1)
(a) If p2 > a/(m-1), then stop. There is no evidence of differences between any of the means in the
remaining comparisons. Procedure is done.
(b) p2 < or = a/(m-1), then reject Ho for C2. Continue to next step.
Step 5: Compare p3 and a/(m-2)
, (a) If p3 > a/(m-2), then stop. There is no evidence of differences between any of the means in the
remaining comparisons. Procedure is done.
(b) p3 < or = a/(m-2), then reject Ho for C3. Continue to next step
Continue until procedure requires you to stop or until all P values have been compared
Kruskal-Wallis Test - correct answer ✔✔The nonparametric analog to a Model I One-Way ANOVA. We
would use if it we reject the assumption of normality for the data.
Randomized-Complete Block Design ANOVA - correct answer ✔✔Used to extend paired experimental
designs to accommodate making more than just two measurements on the same individuals. Also called
Repeated Measures ANOVA.
Model Assumptions:
1. Each observation constitutes a random, independent sample from a population with mean u_ij. There
are k x b of these populations sampled.
2. Each of the k x b populations is normal and with the same variance.
3. The treatment and block effects are additive, that is, there is no interaction (synergy or interference)
between blocks and treatments.
Factorial-Design Two-Way ANOVA - correct answer ✔✔Model Assumptions:
1. The observations in each cell constitute an independent random sample of size n from a population
with mean u_ij
2. Each of the population represented by the cell samples is normal and has the same variance.
Friedman k-sample Test: Matched Data - correct answer ✔✔The nonparametric analog to the
Randomized-Complete Block Design ANOVA
Linear Regression - correct answer ✔✔Examines the amount of variability in one variable (Y) that is
explained by the changes in another variable (X). Typically used in situations in which we have control of
X and can measure it essentially without error.
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 BukayoSaka120. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83637 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now