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The exponential distribution's memorylessness means past waiting time affects future waiting:
AVery strongly
BAfter an hour
CIn big samples
DNot at all
Answer & Solution
Correct answer: D. Not at all
1. Memorylessness is the defining oddity of the exponential distribution.
2. The property is introduced as memorylessness of the exponential distribution.
3. It uses the example where time between customers is exponential with mean two minutes.
4. Having already waited tells you nothing extra about how much longer you will wait.
5. So past waiting time affects future waiting not at all.
_Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 5 'Continuous Random Variables', sections 5.1-5.3_
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