General Fertility Rate (GFR) relates live births to the number of women aged: MCQ with Answer and Explanation

General Fertility Rate (GFR) relates live births to the number of women aged:

A. All ages

B. 15-49 years

C. 20-40 years

D. Above 50 years

Answer: Option B

GFR uses the female population in the reproductive age group 15-49 as denominator.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

A data set has a mean of 50 and a standard deviation of 5. If 3 is added to each value, the new coefficient of variation is:

A. 12%

B. Unchanged

C. 9.43%

D. 10%

Correct Answer: Option C

Explanation:
New mean = 53, SD unchanged=5. CV = (5/53)×100 ≈ 9.43%.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

The arithmetic mean of first n natural numbers is:

A. n/2

B. (n+1)/2

C. 2n+1

D. n(n+1)/2

Correct Answer: Option B

Explanation:
Sum = n(n+1)/2, mean = (n+1)/2.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

In a frequency polygon, the points plotted are:

A. Upper limits vs frequencies

B. Cumulative frequencies vs upper boundaries

C. Class midpoints vs frequencies

D. Lower limits vs frequencies

Correct Answer: Option C

Explanation:
A frequency polygon connects the midpoints of histogram bars at their respective frequencies.

This question belongs to: Accountancy and Statistics Statistics