Vital statistics are used for: MCQ with Answer and Explanation

Vital statistics are used for:

A. All of the above

B. Planning health services

C. Actuarial calculations

D. Estimating population growth

Answer: Option A

Vital statistics inform public health planning, demographic estimates, and insurance mathematics.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

A random variable X has expected value E(X) = 5 and E(X²) = 29. The variance is:

A. 24

B. 5

C. 4

D. 2

Correct Answer: Option C

Explanation:
Var(X) = E(X²) - [E(X)]² = 29 - 25 = 4.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

A questionnaire should avoid 'double-barreled' questions because they:

A. Use difficult words

B. Are too short

C. Are too long

D. Ask about two things at once, confusing the respondent

Correct Answer: Option D

Explanation:
Double-barreled questions combine two queries, making it hard to answer accurately.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

In the schedule method of data collection, who fills the form?

A. A postal agent

B. The supervisor

C. The informant

D. The enumerator

Correct Answer: Option D

Explanation:
Schedule is a form filled by the enumerator while interviewing the informant.

This question belongs to: Accountancy and Statistics Statistics