Questions: Homework Question 5, 7.D. 4 Part 2 of 3 HW Score: 96.67%, 14.5 of 15 points Points: 0.5 of 1 Explain the meaning of "life expectancy." How does life expectancy change with age? How is it affected by changes in the overall health of a population? Define "life expectancy." Choose the best answer below. A. Life expectancy is the average age a person in a population is expected to live, including ages of people with death due to accidents. B. Life expectancy is the number of years a person of a given age has lived so far. C. Life expectancy is the number of additional years a person of a given age can expect to live on average. D. Life expectancy is the average age a person in a population is expected to live, only including ages of people with death due to health issues. Life expectancy with age.

Solution Steps

1. Define "life expectancy" by choosing the best answer from the given options.
2. Determine how life expectancy changes with age.
3. Discuss how life expectancy is affected by changes in the overall health of a population.

Life expectancy is defined as the number of additional years a person of a given age can expect to live on average. This can be expressed as: \[ \text{Life Expectancy} = E(X) \quad \text{where } X \text{ is the age of the individual.} \]

Life expectancy generally increases with age. This means that as individuals grow older, their expected remaining years of life tend to increase due to factors such as improved healthcare and lifestyle choices.

Life expectancy is positively affected by improvements in the overall health of a population. Specifically, if the health conditions of a population improve, the average life expectancy can be expected to increase. This can be represented as: \[ \text{If } H \text{ (health) increases, then } E(X) \text{ increases.} \]

Final Answer