ATI RN
Epidemiology Questions Questions
Question 1 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 2 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 3 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.
Question 4 of 5
Compared with a scatter diagram, a dot plot:
Correct Answer: B
Rationale: Dot plots use one continuous and one categorical variable, unlike scatter diagrams’ two continuous variables.
Question 5 of 5
Vital statistics provide an archive of certain health data. These data do not become surveillance data until they are analyzed, interpreted, and disseminated with the intent of influencing public health decision-making or action.
Correct Answer: A
Rationale: Vital statistics require analysis and dissemination to become actionable surveillance data.