What is the term for the predicted average number of years of life remaining for a person at a given age?

What is the term for the predicted average number of years of life remaining for a person at a given age?

• A. Life Span
• B. Life Expectancy
• C. Longevity
• D. Survival

Answer: (B)

Life expectancy is the predicted average number of years of life remaining for a person at a given age, based on current mortality rates. It’s calculated from life tables and is conditional on being alive at that age, so it can change depending on how old you are. For example, life expectancy at birth reflects the average years a newborn is expected to live, while life expectancy at age 65 reflects the additional years a someone who has already reached 65 is expected to live. This differs from life span, which is about the maximum age observed rather than the average remaining years; longevity is a broader term for long life; and survival refers to the probability of surviving to a future point, not the average remaining years.

Life expectancy is the predicted average number of years of life remaining for a person at a given age, based on current mortality rates. It’s calculated from life tables and is conditional on being alive at that age, so it can change depending on how old you are.

For example, life expectancy at birth reflects the average years a newborn is expected to live, while life expectancy at age 65 reflects the additional years a someone who has already reached 65 is expected to live. This differs from life span, which is about the maximum age observed rather than the average remaining years; longevity is a broader term for long life; and survival refers to the probability of surviving to a future point, not the average remaining years.