If a country's life expectancy at birth is high, it indicates: MCQ with Answer and Explanation

If a country's life expectancy at birth is high, it indicates:

A. Poor healthcare

B. Low fertility

C. Good overall health conditions

D. High infant mortality

Answer: Option C

High life expectancy reflects low mortality and better health services.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

Three machines produce 60%, 30%, 10% of items with defect rates 2%, 3%, 4%. If an item is defective, probability it came from the third machine is:

A. 0.25

B. 0.04

C. 0.16

D. 0.10

Correct Answer: Option C

Explanation:
P(D) = 0.6×0.02 + 0.3×0.03 + 0.1×0.04 = 0.012+0.009+0.004=0.025. P(M3|D) = 0.004/0.025 = 0.16.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

Which of the following is a principle of questionnaire design?

A. Maintain a logical flow from general to specific

B. Ask personal questions at the beginning

C. Use double negatives

D. Use ambiguous terms

Correct Answer: Option A

Explanation:
Logical sequencing improves response quality and reduces dropout.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

Age-specific death rates are used to compute:

A. Infant mortality rate

B. Standardized death rate

C. Maternal mortality ratio

D. Crude death rate

Correct Answer: Option B

Explanation:
Standardized death rate applies age-specific rates to a standard population to compare mortality.

This question belongs to: Accountancy and Statistics Statistics