AP Statistics chart assignment

Chart 1 of 1 · Health

How long do Americans live, and how has that changed since 1900?

A baby born in the US in 2018 could expect to live 78.7 years, up from 47.3 in 1900. The sharpest drop was in 1918, to 39.1 years, during the influenza pandemic. This CDC dataset stops at 2018; later NCHS reports put life expectancy at 78.4 years in 2023 and 79.0 in 2024, after a fall during the COVID-19 pandemic.

Source: CDC National Center for Health Statistics, Death rates and life expectancy at birth (Public domain (U.S. government work)) · Data as of Dec 31, 2018

How to read this chart

Each point is how long a baby born in that year could expect to live, if death rates stayed as they were that year. It is an average, so it is pulled down a lot when many babies and young people die. Hover or tap a point to read its year and value.

Questions

1. Find the sharpest drop on the chart. What happened in the world that year?
2. Life expectancy in 1900 was under 50. Does that mean most adults died in their 40s? What else could lower the average?
3. What changes in medicine, food or public health could explain the long rise?

Chart and numbers: chart.ly/charts/us-life-expectancy · More free charts at chart.ly