PUBH 3130 Exam 2
Actual Questions and Answers with 100% Accuracy
(VERIFIED BY PROFESSOR)
Epidemiological Methods, Biostatistical Analysis,
Study Designs, and Environmental Health Assessments
Author: Division of Epidemiology and Community Health
School of Public Health, University of Minnesota
Contact: | Minneapolis, MN 55455
Academic Year 2026-2027 | Exam 2
Date: June 16, 2026
Abstract
This examination comprises 40 multiple-choice questions assessing mastery of
epidemiological methods, biostatistical analysis, study design validity, and environmental
health within the PUBH 3130 curriculum aligned with 2026-2027 standards. Four sections:
(1) Epidemiological Principles and Measures of Disease Frequency; (2) Observational
Study Designs and Validity; (3) Biostatistics, Statistical Inference, and Data Interpretation;
(4) Environmental and Occupational Health with 2026 updates. Questions distribute across
recall (30%), application (50%), and analysis (20%) cognitive levels with 75%
scenario-based items. All content verified against peer-reviewed sources and current
CDC/WHO guidelines.
Keywords: Epidemiological Methods; Biostatistics; Study Design; Confounding; Environmental Health;
Occupational Safety; 2026 Standards
Exam PUBH 3130 Exam 2
Type Actual Q&A (VERIFIED BY PROFESSOR)
Questions 40 (2.5 pts each = 100 pts)
Passing 80% (80/100 pts)
Cognitive Recall 30% | Application 50% | Analysis 20%
Style 75% Scenario-Based | 25% Direct
Framework CDC/WHO 2026, AI-Assisted Methods
, PUBH 3130 Exam 2 | VERIFIED BY PROFESSOR
Section 1: Epidemiological Principles & Measures of Disease Frequency
Q1. A city of 500,000 reports 2,500 new influenza cases during a 3-month winter season, with 50
influenza-related deaths. What is the case fatality rate? [Application]
A. A. 0.01%, calculated as (50/500,000) x 100
B. B. 2.0%, calculated as (50/2,500) x 100 [CORRECT]
C. C. 10.0%, calculated as (50/500) x 100
D. D. 0.5%, calculated as (2,500/500,000) x 100
Correct Answer: B
Rationale: CFR = (deaths among cases / total cases) x 100 = (50/2,500) x 100 = 2.0%.
Q2. A population of 200,000 has 4,000 prevalent diabetes cases on Jan 1, 2026. During 2026, 800 new
cases are diagnosed and 200 diabetic individuals die (no migration). What is the approximate point
prevalence on Jan 1, 2027? [Application]
A. A. 2.3%, calculated as 4,600/200,000 x 100 (4,600 = 4,000 + 800 - 200) [CORRECT]
B. B. 0.4%, the annual cumulative incidence (800/200,000)
C. C. 2.4%, without accounting for deaths
D. D. 2.0%, excluding new cases
Correct Answer: A
Rationale: Prevalence = existing + new - deaths = 4,600. Rate = 4,600/200,000 = 2.3%.
Q3. A country has 120,000 live births and 1,440 infant deaths. What is the infant mortality rate?
[Application]
A. A. 12.0 per 1,000 live births, reflecting the probability of dying before age 1 [CORRECT]
B. B. 1.2%, reflecting maternal mortality
C. C. 1,440 per 120,000, not comparable across countries
D. D. 0.012 per person, same as crude death rate
Correct Answer: A
Rationale: IMR = (1,440/120,000) x 1,000 = 12.0 per 1,000 live births.
Q4. Which correctly distinguishes incidence proportion from incidence rate? [Recall]
A. A. Incidence proportion uses person-time; incidence rate uses number of persons
B. B. Incidence proportion = proportion of a closed population developing the outcome; incidence
rate = new cases per unit person-time at risk [CORRECT]
C. C. They always produce identical values
D. D. Incidence rate can only be calculated in clinical trials
Correct Answer: B
Rationale: Cumulative incidence uses baseline population; incidence rate accounts for varying follow-up.
Q5. A cohort of 5,000 workers: 500 develop respiratory disease over 48,000 person-years. What is the
incidence rate per 1,000 person-years? [Application]
A. A. 10.0 per 1,000 person-years
B. B. 10.4 per 1,000 person-years [CORRECT]
C. C. 10.0%, the cumulative incidence
D. D. 1.04 per 1,000 person-years
Correct Answer: B
Rationale: Incidence rate = 500/48,000 x 1,000 = 10.42 per 1,000 person-years.
Q6. Which measure best captures both premature mortality and years lived with disability? [Recall]
A. A. Crude death rate
Page 2
Actual Questions and Answers with 100% Accuracy
(VERIFIED BY PROFESSOR)
Epidemiological Methods, Biostatistical Analysis,
Study Designs, and Environmental Health Assessments
Author: Division of Epidemiology and Community Health
School of Public Health, University of Minnesota
Contact: | Minneapolis, MN 55455
Academic Year 2026-2027 | Exam 2
Date: June 16, 2026
Abstract
This examination comprises 40 multiple-choice questions assessing mastery of
epidemiological methods, biostatistical analysis, study design validity, and environmental
health within the PUBH 3130 curriculum aligned with 2026-2027 standards. Four sections:
(1) Epidemiological Principles and Measures of Disease Frequency; (2) Observational
Study Designs and Validity; (3) Biostatistics, Statistical Inference, and Data Interpretation;
(4) Environmental and Occupational Health with 2026 updates. Questions distribute across
recall (30%), application (50%), and analysis (20%) cognitive levels with 75%
scenario-based items. All content verified against peer-reviewed sources and current
CDC/WHO guidelines.
Keywords: Epidemiological Methods; Biostatistics; Study Design; Confounding; Environmental Health;
Occupational Safety; 2026 Standards
Exam PUBH 3130 Exam 2
Type Actual Q&A (VERIFIED BY PROFESSOR)
Questions 40 (2.5 pts each = 100 pts)
Passing 80% (80/100 pts)
Cognitive Recall 30% | Application 50% | Analysis 20%
Style 75% Scenario-Based | 25% Direct
Framework CDC/WHO 2026, AI-Assisted Methods
, PUBH 3130 Exam 2 | VERIFIED BY PROFESSOR
Section 1: Epidemiological Principles & Measures of Disease Frequency
Q1. A city of 500,000 reports 2,500 new influenza cases during a 3-month winter season, with 50
influenza-related deaths. What is the case fatality rate? [Application]
A. A. 0.01%, calculated as (50/500,000) x 100
B. B. 2.0%, calculated as (50/2,500) x 100 [CORRECT]
C. C. 10.0%, calculated as (50/500) x 100
D. D. 0.5%, calculated as (2,500/500,000) x 100
Correct Answer: B
Rationale: CFR = (deaths among cases / total cases) x 100 = (50/2,500) x 100 = 2.0%.
Q2. A population of 200,000 has 4,000 prevalent diabetes cases on Jan 1, 2026. During 2026, 800 new
cases are diagnosed and 200 diabetic individuals die (no migration). What is the approximate point
prevalence on Jan 1, 2027? [Application]
A. A. 2.3%, calculated as 4,600/200,000 x 100 (4,600 = 4,000 + 800 - 200) [CORRECT]
B. B. 0.4%, the annual cumulative incidence (800/200,000)
C. C. 2.4%, without accounting for deaths
D. D. 2.0%, excluding new cases
Correct Answer: A
Rationale: Prevalence = existing + new - deaths = 4,600. Rate = 4,600/200,000 = 2.3%.
Q3. A country has 120,000 live births and 1,440 infant deaths. What is the infant mortality rate?
[Application]
A. A. 12.0 per 1,000 live births, reflecting the probability of dying before age 1 [CORRECT]
B. B. 1.2%, reflecting maternal mortality
C. C. 1,440 per 120,000, not comparable across countries
D. D. 0.012 per person, same as crude death rate
Correct Answer: A
Rationale: IMR = (1,440/120,000) x 1,000 = 12.0 per 1,000 live births.
Q4. Which correctly distinguishes incidence proportion from incidence rate? [Recall]
A. A. Incidence proportion uses person-time; incidence rate uses number of persons
B. B. Incidence proportion = proportion of a closed population developing the outcome; incidence
rate = new cases per unit person-time at risk [CORRECT]
C. C. They always produce identical values
D. D. Incidence rate can only be calculated in clinical trials
Correct Answer: B
Rationale: Cumulative incidence uses baseline population; incidence rate accounts for varying follow-up.
Q5. A cohort of 5,000 workers: 500 develop respiratory disease over 48,000 person-years. What is the
incidence rate per 1,000 person-years? [Application]
A. A. 10.0 per 1,000 person-years
B. B. 10.4 per 1,000 person-years [CORRECT]
C. C. 10.0%, the cumulative incidence
D. D. 1.04 per 1,000 person-years
Correct Answer: B
Rationale: Incidence rate = 500/48,000 x 1,000 = 10.42 per 1,000 person-years.
Q6. Which measure best captures both premature mortality and years lived with disability? [Recall]
A. A. Crude death rate
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