Nokea
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.
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Demographic gap means
- A. Differences in sex ratio
- B. Differences between age-specific birth and death rates
- C. Differences between birth and death rates
- D. Differences in child and women ratio
Correct Answer: C
Rationale: Demographic gap refers to the difference between birth and death rates in a population, indicating population growth or decline.
Nepal red cross society established in
- A. 1969
- B. 1963
- C. 1965
- D. 1967
Correct Answer: B
Rationale: The Nepal Red Cross Society was founded in 1963.
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.
The mean BP of a group of persons was determined and after an intervention trial the mean BP was estimated again the test to be applied to determine the significance of intervention is:
- A. Chi square test
- B. Paired test
- C. Correlation coefficient
- D. Z test
Correct Answer: B
Rationale: Paired tests evaluate changes within the same group before and after an intervention.
Temperature is......scale
- A. Ordinal scale
- B. Interval scale
- C. Ratio scale
- D. Nominal scale
Correct Answer: B
Rationale: Temperature is measured on an interval scale because it has equal intervals but no true zero point.