Concept explainers
Life Expectancy The following table is an abbreviated life expectancy table for U.S. males:
Current Age |
Life Expectancy |
0 |
76.4 |
20 |
77.3 |
40 |
78.7 |
60 |
81.7 |
80 |
88.3 |
(a) Find the straight line that provides the least-squares fit to these data.
(b) Use the straight line of part (a) to estimate the life expectancy of a 30-year-old U.S. male. Note: The actual life expectancy is 78 years.
(c) Use the straight line of part (a) to estimate the life expectancy of a 50-year-old U.S. male. Note: The actual life expectancy is 79.7 years.
(d) Use the straight line of part (a) to estimate the life expectancy of a 90-year-old U.S. male. Note: The actual life expectancy is 94.1 years.
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