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The Aging Times...They Are A-Changing...

Some interesting data about life-expectancy:

  • Average years of life for Americans in 2008 was 78 years
  • Average years of life for Americans in 1900 was 49 years
  • Average years of life for Europeans in the Middle Ages was 31.3 years
  • Average years of life for Ancient Greeks was 28 years
  • Average years of life for Cro-Magnons was 25 years
  • In 2008, people in 41 countries have longer expected life spans than Americans
  • If you are 50 in 2008, on average, you can expect to live to 80.5 years. If you are 65, on average, you can expect to live to 83.4 years.
Question 1: Does the data look linear? Explain. Also, using the best fitting curve, when would you expect the average life span to hit 100 years?

Source: AARP, September 2008, p. 62