Exam (elaborations)
Preliminary Edition of Statistics Learning from Data 1st Edition by Roxy Peck - Test Bank
- Course
- Institution
Preliminary Edition of Statistics Learning from Data 1st Edition by Roxy Peck - Complete Test Bank
[Show more]
Seller
Follow
ExamsExpert
Reviews received
Content preview
, Chapter 1: Collecting Data in Reasonable WaysConcept Quiz
Name _________________________
The answers to the questions below frequently depend on remembering facts, under-
standing concepts, and knowing statistical vocabulary. Before answering, be sure to read
carefully!
T F 1. A simple random sample of size n is by definition a sample that is selected
in a manner to guarantee each individual in the population an equal chance
of selection.
T F 2. Clusters are non-overlapping subgroups of a population that have been
identified as homogeneous.
T F 3. Blocking is used to filter out the effects of some extraneous variables.
T F 4. Response bias occurs when responses are not actually obtained from all
individuals selected for inclusion in the sample.
T F 5. Selection bias occurs if only volunteers are used in a study.
T F 6. Stratified sampling does not involve simple random sampling.
T F 7. Increasing sample size will eliminate bias in a sample.
T F 8. A placebo is designed to be identical in appearance to the treatment of
interest, but contains no active ingredients.
T F 9. A study is an observational study if the investigator observes the behavior
of a response variable after one or more factors have been manipulated.
T F 10. In a well-designed experiment the treatments are confounded with other
variables whenever possible.
Chapter 1, Concept Quiz
Page 1 of 2
, Chapter 1: Collecting Data in Reasonable Ways
Concept Quiz (Cont'd)
T F 11. If the sample size is small relative to the population size, there is little
practical difference in the results of sampling with replacement and
sampling without replacement.
T F 12. A treatment is a particular combination of values for the explanatory
variables.
T F 13. Variables are extraneous if their effects on the response variable cannot be
distinguished from one another.
T F 14. Random assignment to treatments will guarantee that treatment groups are
exactly alike for experimental purposes.
T F 15. The method of control wherein an extraneous variable is held constant is
called blocking.
T F 16. Random subpopulations of a population are called strata.
T F 17. A control group provides a baseline for comparison with a treatment
group.
T F 18. Random assignment of volunteers to treatments will, on average, result in
comparable experimental groups.
T F 19. If the subjects as well as the person measuring the response are aware of
the treatment assigned to the subject, only single-blinding is being used.
Chapter 1, Concept Quiz
Page 2 of 2
, Chapter 1, Concept Quiz Answer Key
1. F
2. F
3. T
4. F
5. T
6. F
7. F
8. T
9. F
10. F
11. T
12. T
13. F
14. F
15. F
16. F
17. T
18. T
19. F
Chapter 1, Concept Quiz Answer Key Page 1 of 1
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 ExamsExpert. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $30.75. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now