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OpenStudy (anonymous):
In a room of 1000 people over age 79, how many do you expect will NOT have retired yet?
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OpenStudy (anonymous):
The time (in years) after reaching age 60 that it takes an individual to retire is approximately exponentially distributed with a mean of about 6 years. Suppose we randomly pick one retired individual. We are interested in the time after age 60 to retirement.
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