Problem

The following table gives the estimated life expectancy in the United States as a function...

The following table gives the estimated life expectancy in the United States as a function of years after 1940.

1 (years after 1940)

3

13

43

63

E (years)

63.3

68.8

74.6

77.5

Source: Atlanta Journal-Constitution.

a. Fit these data with a logarithmic function of the form E(t) = a + b In t.


b. Find E(20) and explain its meaning in this context.


c. In what year does the model predict that the estimated life expectancy will rise to 80 years?

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Solutions For Problems in Chapter 4.3