EPIB301: EXAM 2 PREP WITH QUESTIONS
AND ANSWERS LATEST UPDATE
2026\2027
Manipulations of variables; assigning
What are the characteristics of experimental
participants to exposure group, only use when
studies?
feasible and ethical
Quasi-Experimental and Randomized Control
What are the examples of experimental studies?
trial (RCT)
Investigator watches, and there is no
What are the characteristics of observational
manipulation or exposure. Used when an
studies?
experimental study is not feasible
What are the examples of observational studies? Cohort, case control, and cross-sectional
What are the types of intervention designs? Clinical trials and community trials
What is the focus of clinical trials? Individuals
What is the focus of community trials? Group or community
What is a community trial (community Intervention that is allocated to entire
intervention)? communities
Each participant has the same
probability of being put into the
treatment group
What are the characteristics of randomization Eliminate bias in treatment assignment
(RCT)? Confounding factors will be balanced
between the treatment and control
groups, making these groups directly
comparable
Ensure comparability between study groups by
What is the ultimate goal of randomization
balancing known and unknown confounding
(RCT)?
factors
AND ANSWERS LATEST UPDATE
2026\2027
Manipulations of variables; assigning
What are the characteristics of experimental
participants to exposure group, only use when
studies?
feasible and ethical
Quasi-Experimental and Randomized Control
What are the examples of experimental studies?
trial (RCT)
Investigator watches, and there is no
What are the characteristics of observational
manipulation or exposure. Used when an
studies?
experimental study is not feasible
What are the examples of observational studies? Cohort, case control, and cross-sectional
What are the types of intervention designs? Clinical trials and community trials
What is the focus of clinical trials? Individuals
What is the focus of community trials? Group or community
What is a community trial (community Intervention that is allocated to entire
intervention)? communities
Each participant has the same
probability of being put into the
treatment group
What are the characteristics of randomization Eliminate bias in treatment assignment
(RCT)? Confounding factors will be balanced
between the treatment and control
groups, making these groups directly
comparable
Ensure comparability between study groups by
What is the ultimate goal of randomization
balancing known and unknown confounding
(RCT)?
factors
