The formula to calculate the Cohort Life Expectancy is:
\[ LE = \frac{\sum (P_x \cdot x)}{N} \]
Where:
Cohort life expectancy is a measure used in demography and public health to estimate the average number of years a group of individuals (cohort) is expected to live. This measure takes into account the probability of survival at different ages within the cohort and provides a comprehensive view of the overall life expectancy for that group. It is particularly useful for understanding the long-term health and survival trends of specific populations, such as those born in a particular year or those exposed to certain environmental factors.
Let's assume the following values:
Using the formula:
\[ LE = \frac{(0.9 \cdot 10) + (0.8 \cdot 20) + (0.7 \cdot 30)}{100} = \frac{(9) + (16) + (21)}{100} = \frac{46}{100} = 0.46 \]
The Cohort Life Expectancy is approximately 0.46 years.
