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	Population Pyramid Analysis	Analisi della tavola di mortalità
Campo	Demografia	Demografia
Famiglia	Process / pipeline	Survival analysis
Anno di origine	1874	1984
Ideatore	Francis A. Walker (early age-sex diagrams); standard demographic practice	Demographic/actuarial tradition; Chiang
Tipo	Graphical and tabular analysis of population age-sex structure	Age-structured mortality estimator
Fonte seminale	Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512	Chiang, C. L. (1984). The Life Table and Its Applications. Robert E. Krieger Publishing. ISBN: 978-0-89874-565-2
Alias	Age-sex pyramid, Population age structure diagram, Age structure analysis, Nüfus Piramidi Analizi	Mortality Table, Actuarial Table, Survival Table, Yaşam Tablosu
Correlati	4	3
Sintesi	Population pyramid analysis is the description and interpretation of a population's age-sex structure through a back-to-back horizontal bar chart, with males on one side, females on the other, and age groups stacked from youngest at the bottom to oldest at the top. The shape of the pyramid encodes a population's fertility, mortality, and migration history and is the demographer's first diagnostic of whether a population is young and growing, ageing, or contracting.	A life table is a systematic, age-structured summary of the mortality experience of a population. It traces a hypothetical cohort of births — conventionally 100,000 — through successive age intervals, recording how many survive, how many die, and how many person-years are lived at each interval. The method was formalized in its modern probabilistic form by Chiang (1984), synthesizing centuries of actuarial and demographic practice into a rigorous statistical framework applicable to human and biological populations alike.