Help please! homework help?
2017-06-26 6:49 am
Given an exponential distribution with the rate = 30, what is the probability that the arrival time is between 0.1 and 0.2?
回答 (1)
2017-06-27 2:26 pm
✔ 最佳答案
P( 0.1 ≦ X ≦ 0.2 )= ∫ 30*e^(-30x) dx , from x = 0.1 to x = 0.2
= [ - e^(-30x) ] , from x = 0.1 to x = 0.2
= - [ e^(-6) - e^(-3) ]
= e^(-3) - e^(-6)
≒ 0.0473
Ans: e^(-3) - e^(-6)
( ≒ 0.0473 )
收錄日期: 2021-05-02 14:12:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170625224921AAFrzgJ