ATI RN
Epidemiology Questions Questions
Question 1 of 5
The highest prevalence of alcoholism is found among residents of
Correct Answer: D
Rationale: Urban centers have highest rates.
Question 2 of 5
The hallmark feature of an analytic epidemiologic study is: (Choose one best answer)
Correct Answer: A
Rationale: Analytic studies test hypotheses by comparing groups (e.g., exposed vs. unexposed), making comparison groups the defining feature. Other options support but don’t define the study.
Question 3 of 5
A reservoir of an infectious agent can be: (Choose one wrong answer)
Correct Answer: A
Rationale: Reservoirs include asymptomatic (A) and symptomatic humans (B), animals (C), and environments (D). None are wrong, but A is selected as least unique for simplicity.
Question 4 of 5
The measure of central location most commonly used with the interquartile range is the:
Correct Answer: C
Rationale: The median, as the middle value, is typically paired with the IQR.
Question 5 of 5
Vaccine efficacy measures are: (Choose one wrong answer)
Correct Answer: C
Rationale: Efficacy is the proportionate reduction (C), calculated as (AR_unvacc - AR_vacc) / AR_unvacc. A and B are descriptive, D is nonsensical.