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Life Expectancies

Definition

Life expectancy is the average number of years a person is expected to live, based on current health and mortality trends.

Analogy

Think of life expectancy as the estimated battery life on your phone. When you first get it, the manufacturer gives an estimate (like 10 hours), but actual battery life can vary depending on how you use your phone - just like how lifestyle, environment, and healthcare can affect a person's lifespan.

Related terms

Mortality Rate: The number of deaths in a certain group or population over a specific period.

Birth Rate: The number of live births per 1,000 people in a population in a year.

Demographics: Statistical data relating to the population and particular groups within it.

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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.