Nokea
Describe the 1986 incident in Chernobyl.
- A. A nuclear reactor explosion released radioactive materials.
- B. A controlled experiment involving radiation exposure.
- C. A routine maintenance operation at a power plant.
- D. A natural disaster caused by seismic activity.
Correct Answer: A
Rationale: The Chernobyl disaster involved a nuclear reactor explosion that dispersed radioactive materials across Europe.
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In the study of COPD which test will be suitable:
- A. Z test
- B. t- test
- C. chi-square test
- D. anova test
Correct Answer: B
Rationale: T-tests are commonly used to compare means in studies like those evaluating COPD treatments.
Which of the following is unrelated to the chi square test of significance?
- A. Degree of freedom
- B. Life table
- C. Significance level
- D. Qualitative data
Correct Answer: B
Rationale: Life tables are not directly related to chi-square tests, which assess qualitative data associations.
Two automated blood cell counters are tested twice using a prepared suspension of leukocytes containing 8,000 cells/mm3. The cell counts by device A are 8,400 cells/mm3 the first time and 8,350 cells/mm3 the second. Device B's counts are 8,200 and 7,850 cells/mm3, respectively. Which device(A or B) gives leukocyte counts with greater validity?
- A. Device A
- B. Device B
- C. Both devices have equal validity
- D. Neither device is valid
Correct Answer: A
Rationale: Validity refers to how close the measurements are to the true value (8,000 cells/mm3). Device A's measurements (8,400 and 8,350) are closer to the true value than Device B's (8,200 and 7,850).
The fraction 50 / 54 is a/an:
- A. Attack rate
- B. Food-specific attack rate
- C. Incidence proportion
- D. Proportion
Correct Answer: B
Rationale: This fraction focuses on illness among those exposed to wedding cake.
Arrange a field visit to a health-related agency that is located in your community. An example might be a public health department, nonprofit health-related organization, or research institute. Find out about how epidemiologists contribute to these settings.
- A. Field visits reveal hands-on contributions of epidemiologists to public health initiatives.
- B. Visits are purely recreational.
- C. Agencies do not employ epidemiologists.
- D. Such visits offer no educational benefit.
Correct Answer: A
Rationale: Field visits expose students to applied epidemiology, demonstrating how professionals address public health challenges in real-world contexts.