1. Explain how a survival curves is produced and what it means.
2. Describe changes in survival curves and intensity of mortality factors for U.S. populations during the twentieth century.
3. Describe possible changes in survival curves and their effects on the total population if there are increases in mean longevity, in maximal longevity, or in both parameters.
4. Discuss implications from the current increases in elders and possible additional increases if ML or if ML plus XL increase.
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