If (AB)=30, (Aβ)=20, (αB)=10, (αβ)=40, the total number of observations N is: MCQ with Answer and Explanation

Explanation:
TFR is a period measure summing ASFRs across all reproductive ages (typically 15-49), estimating the average completed family size if current fertility patterns persist, crucial for population projections.

Explanation:
Logical flow helps respondents understand and answer accurately.

Explanation:
Class width (or class size) is the difference between the upper and lower boundaries of a class interval, determining the range of values grouped together in a frequency distribution.