Multiple Choice
The high degree of validity in which type of study stems mainly from the investigator's ability to randomize subjects to either the treatment group or the comparison group and thereby control for distortions produced by confounding variables?
A) Cohort study
B) Ecological study
C) Experimental study
D) Case-crossover study
Correct Answer:
Verified
Correct Answer:
Verified
Q2: Because cases serve as their own controls,
Q3: Experimental studies are commonly classified by their
Q4: The process of gaining the agreement of
Q5: Both the cross-sectional and ecological designs have
Q6: Epidemiological studies that try to determine the
Q7: Observational studies provide information on exposures that
Q8: The classic analytic approach for an experimental
Q9: Which type of study evaluates an association
Q10: The failure to observe the requirements of
Q11: Which of the following is an increasingly