WGU C955 applied probability and statistics Test Exam Review Questions with all Answers verified for accuracy Updated 2024/2025
7 views 0 purchase
Course
WGU C955
Institution
WGU C955
WGU C955 applied probability and statistics Test Exam Review Questions with all Answers verified for accuracy Updated 2024/2025
Only way to prove causation - correct answer Experiments, because they account for lurking variables
Observational study - correct answer A type of study where we me...
WGU C955 applied probability and statistics
Test Exam Review Questions with all Answers
verified for accuracy Updated 2024/2025
Only way to prove causation - correct answer Experiments,
because they account for lurking variables
Observational study - correct answer A type of study where
we measure or survey members of a sample without trying to
affect them. Cannot prove causation.
Experimental study - correct answer A study where you split
subjects up randomly and impose a change on one group to study
the effect; can prove causation
Prospective study - correct answer Is a study that's done over
time to find results / A study watching for outcomes during the
study period
Retrospective study - correct answer A study that looks
backwards to assess outcomes and possible causes after the fact
Control group - correct answer randomly assign people or
things to groups. One group receives a treatment and the other
group does not. This is the group that does not receive treatment
Placebo - correct answer A substance or procedure that has
no effect used for comparison to the real substance or procedure
,Placebo effect - correct answer A beneficial effect produced
by the belief of the patient/subject, not by the intervention itself.
Experimenter effect - correct answer When the persons
running an experiment affects its results by influencing the
subjects inadvertently
Open question - correct answer A question that gives the
responder freedom to answer in many different ways -- harder to
analyze with statistics.
Closed question - correct answer A question with limited
choices, e.g. multiple choice or yes/no. Easier to analyze
statistically.
Unbalanced response - correct answer Giving more options
that are negative than positive options (or vice versa) which
biases the responses towards the more common option
Matched pairs - correct answer Grouping two similar subjects
and giving different treatments/procedures to each in order to
compare the differences. For example, having one twin take a
medication while the other twin does not.
Blind experimental study - correct answer When information
of a study isn't revealed to the participants
, Double Blind Study - correct answer When information of
study is hidden from the researcher and the participant.
Population - correct answer The entire group you are trying
to describe or understand.
Sampling frame - correct answer List of group from which
you choose your sample.
Sample - correct answer The group that is actually picked to
be included in a study
Simple random sample - correct answer making a selection
by following a random pattern and selecting without
replacement. Unbiased.
Systematic sample - correct answer Sample is selected by
listing the sampling frame, then making a selection by following
a simple pattern (eg. Every 20th name). Unbiased.
Voluntary sample - correct answer Members of the sample
may choose not to respond. Similar to Non Response.
Convenience sample - correct answer Participants are easy
for researcher to access. Tends to increase bias.
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 KieranKent55. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
