Life expectancy is the expected (in the statistical sense) number of years of life remaining at a given age. It is denoted by ex, which means the average number of subsequent years of life for someone now aged x, according to a particular mortality experience. (In technical literature, this symbol means the average number of complete years of life remaining, excluding fractions of a year. The corresponding statistic including fractions of a year, the normal meaning of life expectancy, has a symbol with a small circle over the e.) In the modern era, life expectancy has increased so dramatically as to call into question the ability to use current data for very long range predictions into the future.
The term that is known as life expectancy is most often used in the context of human populations, but is also used in plant or animal ecology; it is calculated by the analysis of life tables (also known as actuarial tables). The term life expectancy may also be used in the context of manufactured objects although the related term shelf life is used for consumer products and the terms "mean time to breakdown" (MTTB) and "mean time before failures" (MTBF) are used in engineering l.a.
Read more about Life Expectancy: Interpretation of Life Expectancy, Human Life Expectancy Patterns, Evolution and Aging Rate, Calculating Life Expectancies, Life Expectancy Forecasting, Policy Uses of Life Expectancy, Life Expectancy Vs. Life Span
Other articles related to "life expectancy, life":
... This is map and list of European countries by life expectancy from World Population Prospects 2006 revision ... Atlantic Ocean North Sea Norwegian Sea Strait of Gibraltar State (51) life expectancy Albania 76.4 Andorra 83.5 Armenia 72.1 Austria 79.8 Azerbaijan 67.5 ...
... Male life expectancy at birth was at 60.85 and female life expectancy was at 64.76 in 2012 ... Healthy life expectancy was at 54 in 2006 ...
... United States' high infant mortality and mediocre life expectancy are not indicative of the quality of health care ... In the latter case, they note that while Japan has a longer life expectancy, Japanese Americans enjoy the same long life expectancy ...
... Life expectancy is often confused with life span to the point that they are nearly synonyms when people hear 'life expectancy was 35 years' they often interpret this as meaning that people of that ... The average life expectancy in the 18th century was 35 years ... was forever." This ignores the fact that the life expectancy generally quoted is the at birth number which is an average that includes all the babies that die before their ...
... Average life expectancy for Georgians is 74.2, which lies just below the European average of about 75 years ... Interestingly, the average life expectancy in former-Soviet Russia lies drastically below Georgia's at about 66 years ... The life expectancy in Georgia is 69.3 for males, and 79.0 for females ...
Famous quotes containing the words expectancy and/or life:
“If I had my life over again I should form the habit of nightly composing myself to thoughts of death. I would practise, as it were, the remembrance of death. There is no other practice which so intensifies life. Death, when it approaches, ought not to take one by surprise. It should be part of the full expectancy of life. Without an ever- present sense of death life is insipid. You might as well live on the whites of eggs.”
—Muriel Spark (b. 1918)
“I have almost forgot the taste of fears.
The time has been, my senses would have cooled
To hear a night-shriek, and my fell of hair
Would at a dismal treatise rouse and stir
As life were int. I have supped full with horrors;
Direness, familiar to my slaughterous thoughts,
Cannot once start me.”
—William Shakespeare (15641616)