Question

define life expectancy at birth​

Answer 1

Answer:

Life expectancy at birth. Life expectancy at birth is defined as how long, on average, a newborn can expect to live, if current death rates do not change. However, the actual age-specific death rate of any particular birth cohort cannot be known in advance.

Explanation:

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Answer 2

Answer:

Life expectancy is a statistical measure of the average time an organism is expected to live, based on the year of its birth, its current age, and other demographic factors including gender. The most commonly used measure is life expectancy at birth, which can be defined in two ways