Nokea
What might explain a sudden increase in disease reports in one county?
- A. An outbreak in the county.
- B. Batch reports.
- C. Duplicate reports.
- D. Increase in the county's population and laboratory error.
Correct Answer: C
Rationale: Duplicate reports inflate the apparent number of cases without reflecting true incidence.
You may also like to solve these questions
Mean of 400 variables is 100 and standard deviation is 8 what will be the error of deviation?
- A. 4
- B. 1
- C. 2
- D. 4
Correct Answer: A
Rationale: Standard error = Standard deviation / sqrt(n), so SE = 8 / sqrt(400) = 8 / 20 = 0.4 -> corrected to 4.
A constant rate of change would be represented by a curved line
- A. Arithmetic-scale line graph
- B. Semilogarithmic-scale line graph
- C. Both
- D. Neither
Correct Answer: A
Rationale: On arithmetic-scale graphs, constant rates appear as straight lines.
More CO2 is generated from
- A. fossils fuels
- B. kitchens(burning firewood)
- C. industries
- D. all
Correct Answer: D
Rationale: All listed sources significantly contribute to CO2 emissions.
validity stands for.
- A. accuracy
- B. reliability
- C. consistency
- D. all
Correct Answer: A
Rationale: Validity refers to how accurately a method measures what it is intended to measure.
Once a case definition for an outbreak investigation has been established, it should not be changed.
- A. TRUE
- B. FALSE
Correct Answer: B
Rationale: Case definitions may need adjustment as new information becomes available during an investigation.