Life Expectancy Quiz

Example Questions From the Test

• 1A reputable estimate gives a range of possible remaining years rather than one exact number. Why is the range more informative?
  • It guarantees the person’s lifespan will end at the midpoint
  • It communicates uncertainty instead of implying that an individual lifespan is precisely knowable
  • It converts a population estimate into a clinical diagnosis
  • It removes the influence of future health and environmental changes
• 2Researchers interview only people who reached age 100 and notice that many share a particular habit. Why can this alone not prove that the habit causes exceptional longevity?
  • People who reach 100 cannot accurately report any past behavior
  • The study selects survivors and lacks a suitable comparison for people who did not reach 100
  • Habits cannot have any relationship with health outcomes
  • A habit is causal whenever it appears in most members of a selected group
• 9If mortality rates genuinely decline at every age and all else is comparable, what should happen to calculated life expectancy?
  • It should increase
  • It should decrease
  • It should equal the average age of the population
  • It should automatically become the maximum human lifespan