It is used in measuring midpoint of a large set of data distribution which will latter reflect the central value of the distribution. The central value is the value which divides the data distribution into two groups with each equal measurement. The median follows the principle of arranging the data in ascending order which makes it relevant in getting the middle data in the distribution.
c) The above value means that incase the age structure of US is arranged in ascending order, the age structure which will divide the highest and the lowest will be 37.2. It reveals the central point among the age structures when they are arranged from the lowest to the highest. Similarly, it shows that the US age structure is centralized at this figure when al the age structures are arranged in ascending order which will bring this