Nokea
Net reproduction rate (NRR=1) implies a couple protection rate (CPR) of
- A. 50
- B. 60
- C. 70
- D. 80
Correct Answer: A
Rationale: An NRR of 1 indicates replacement-level fertility, which corresponds to a CPR of approximately 50% in most populations.
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On which day and at which meal was exposure most likely in the norovirus outbreak among tourists?
- A. April 19 Dinner
- B. April 20 Breakfast
- C. April 20 Lunch
- D. April 20 Dinner
Correct Answer: D
Rationale: Given the incubation period, dinner on April 20 aligns with symptom onset timing.
The truth about normal distribution curve is all except
- A. Mean median and mode of all confidence
- B. Standard deviation is one
- C. Mean of the curve is hundred
- D. The total area of the curve is one
Correct Answer: C
Rationale: The mean of a standard normal curve is 0, not 100.
Should the case definition for surveillance match the clinical case definition?
- A. True.
- B. FALSE
Correct Answer: B
Rationale: Surveillance and clinical case definitions may differ because they serve different purposes; clinical definitions focus on treatment, while surveillance definitions optimize detection.
What is the incidence of disease during July?
- A. 3 / 700
- B. 4 / 700
- C. 5 / 700
- D. 8 / 700
Correct Answer: A
Rationale: Incidence counts only new cases during a time period.
When analyzing surveillance data by age, which age groups are preferred?
- A. 1-year age groups
- B. 5-year age groups
- C. 10-year age groups
- D. Depends on the disease
Correct Answer: D
Rationale: The choice of age grouping depends on the disease being studied and the population structure.