The geometric mean of a set of 5 positive observations is 6. Four of them are 3, 6, 4, and 9. The fifth observation is: MCQ with Answer and Explanation

The geometric mean of a set of 5 positive observations is 6. Four of them are 3, 6, 4, and 9. The fifth observation is:

A. 18

B. 8

C. 12

D. 10

Answer: Option C

G.M.^5 = 6^5 = 7776. Product of known four = 3*6*4*9 = 648. Fifth = 7776/648 = 12.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

Neonatal Mortality Rate relates to deaths of infants occurring within:

A. The first 24 hours of life

B. The first 28 days of life

C. The first year of life

D. The first 7 days of life

Correct Answer: Option B

Explanation:
Neonatal deaths are those occurring in the first 28 days (or 4 weeks) after birth.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

If the Net Reproduction Rate (NRR) is exactly 1, what does it signify for the population over the long term, assuming no migration?

A. The population is exactly replacing itself

B. The population will grow exponentially

C. The population will eventually shrink

D. The population will double in one generation

Correct Answer: Option A

Explanation:
An NRR of 1 means each woman is replacing herself with exactly one surviving daughter, indicating replacement-level fertility.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

Net Reproduction Rate (NRR) differs from Gross Reproduction Rate (GRR) because NRR takes into account:

A. Mortality rates of mothers

B. Migration rates

C. Male births

D. Economic status

Correct Answer: Option A

Explanation:
NRR adjusts the GRR by factoring in the probability that a female child will survive through her reproductive years.

This question belongs to: Accountancy and Statistics Statistics