[問題]統計三個問題

看板Statistics作者oceanboy0605時間18年前 (2008/01/04 22:01)推噓3(3推 0噓 3→)

留言6則, 2人參與討論串1/2 (看更多)

以下我有統計三題我各位幫忙，除了有過程之外，最好需要有詳細解說我會比較容易瞭解～謝謝 1.求算二項分配的眾數 2.If 5% of the tires purchased by a cab company last less than 6 months and if 20 tires are purchased, calculate the probability that at most 2 of the tires will expire in six months using. If the mean length of life a tire 2 years. Use the exponential distribution to calculate the probability that the life of a tire will be less than 6 months? 3.Suppose the lifelime of an electronic tube has an exponential distribution with a mean time of 1/λ hours. Find the expected lifelime of a tube,given that the tube has lasted at least T hours. -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 218.167.62.1

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ashugh

01/04 22:05, , 1^F

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ashugh

01/04 22:06, , 2^F

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ashugh

01/04 22:08, , 3^F

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