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Answers for “在失败计数约定下,几何分布是什么?”

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A suitable rare-event limit links these discrete stories to Poisson counts and exponential waiting times.

Conditions: The context is a rare-event limit.; The variables represent counts and waiting times.

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The geometric distribution describes the number of failures before the first success, provided the trials are independent and the success probability remains fixed.

Conditions: Trials are independent.; Success probability is fixed.; The convention counts the number of failures before the first success.

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Counting successes in a fixed block of trials gives a binomial variable, while counting failures before a fixed number of successes gives a negative binomial variable.

Conditions: Trials are independent with a fixed success probability.; The first scenario involves a fixed total number of trials.; The second scenario involves waiting for a fixed number of successes.