Question

befine Life Expectancy Rate​

Answer 1

Answer:

Life expectancy is a statistical measure of the average (see below) 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 (LEB), which can be defined in two ways. Cohort LEB is the mean length of life of an actual birth cohort (all individuals born a given year) and can be computed only for cohorts born many decades ago, so that all their members have died.....

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Answer 2

Explanation:

Variation over time

Era Life expectancy at birth in years

Early 19th-century England 40

1900 world average 31

1950 world average 48

2017 world average 72.2