Question

What is life expectancy

Answer 1

Life expectancy refers to the number of years a person is expected to live based on the statistical average. Life expectancy varies by geographical area and by era. In the Bronze age, for example, life expectancy was 26 years, while in 2010, it was 67 years.

In mathematical terms, life expectancy refers to the expected number of years remaining for an individual at any given age. In formulaic terms, life expectancy is denoted  by ex, where, “e” represents the expected number of years remaining and “x” represents the person’s present age.

The life expectancy for a particular person or population group depends on several variables such as their lifestyle, access to healthcare, diet, economical status and the relevant mortality and morbidity data. However, as life expectancy is calculated based on averages, a person may live for many years more or less than expected.

Answer 2

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Life expectancy:

→ Life expectancy is the number of years an individual can expect to live for.

It is based on average life Span.

Average life Span:

→ It is defined as the age at which half the population still survives.

Life expectancy is the characteristic of a population.