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Age composition median age formula Subtract the lower of the range's numbers from the greater, then divide the result by two to get the median. As an example:- The median age range of 15-19 years is 17, and the median age range of 40-49 years is 44.5.

It can be calculated by dividing the population 0-14 years and 65 years and older by the population that is in the 15-64 year age group. Example: A community has 41,650 children under age 14 and 6,800 persons age 65 and over.

Age distribution, also called Age Composition, in population studies, the proportionate numbers of persons in successive age categories in a given population. Age distributions differ among countries mainly because of differences in the levels and trends of fertility.

Common summary measures of age structure include the mean age of population, median age of population, proportion of population at young ages (e.g., under age 20), and proportion of population at old ages (e.g., age 65 and above).

For example, if we have 5 people aged 20, 35, 15, 5, and 60, mean age is 125/5 = 25. However, had they been aged 80, 5, 30, 7, and 3, the mean age would still be 25, even if the age distribution would look very different from the previous one.

The relative abundance of the organisms of various age groups in the population is called age distribution of population.

Calculate age in Excel with DATEDIF Y - returns the number of complete years between the start and end dates. M - returns the number of complete months between the dates. D - returns the number of days between the two dates. YM - returns months, ignoring days and years.