Life expectancy is the number of years that the average person born in a particular year will probably live.
According to the year of birth, current age, and other demographic factors like gender, an organism's life expectancy can be calculated statistically as the length of time on average that it is expected to live. Life expectancy at birth (LEB), which has two definitions, is the most frequently used metric. Cohort LEB is the average lifespan of a birth cohort (all people born in a given year), and it can only be calculated for cohorts whose members have all passed away. Period LEB is the average number of years that a hypothetical cohort would live if they were subjected to the annual mortality rates from birth to death.
Learn more about Life expectancy here:
brainly.com/question/7184917
#SPJ4
