Since Exercises use real data, they are best answered with technology.
Life Expectancy The following table is an abbreviated life expectancy table for U.S. males:
Current Age | Life Expectancy |
0 | 75.4 |
20 | 76.4 |
40 | 77.8 |
60 | 80.9 |
80 | 87.9 |
(a) Find the straight line that provides the best leastsquares 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 77.1 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 79.0 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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