Nokea
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.
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What is the RR of dying of coronary thrombosis for smokers versus nonsmokers?
- A. 1.2
- B. 1.3
- C. 1.4
- D. 1.5
Correct Answer: C
Rationale: RR = (Death rate among smokers / Death rate among nonsmokers) = 599 / 422 ≈ 1.42. Smokers have a 1.42 times higher risk of dying from coronary thrombosis compared to nonsmokers.
In any programme target refers to:
- A. set of activities
- B. objective of programme
- C. degree of achievement
- D. evaluation to be done
Correct Answer: C
Rationale: Targets in programs refer to the degree or level of achievement expected.
Health education on early diagnosis and treatment is
- A. primary prevention
- B. secondary prevention
- C. tertiary prevention
- D. primordial prevention
Correct Answer: B
Rationale: Secondary prevention involves early detection and intervention to halt or slow the progression of disease.
Define the following terms: Controlled clinical trial
- A. A study where all participants receive the same treatment.
- B. A trial comparing an intervention against a control group.
- C. A trial without any specific hypotheses.
- D. A trial conducted without ethical approval.
Correct Answer: B
Rationale: Controlled clinical trials compare interventions to a control to establish causality.
According to guideline recommended by WHO for quality of water E coli in distribution system per 100 ml of water is
- B. 50
- C. 100
- D. 5
Correct Answer: A
Rationale: WHO guidelines specify that no E. coli should be present in drinking water.