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33題，有人可以幫我列算式就好嗎 是波氏分配（卜瓦松分配）題目

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3 JjnaPoisson distributionn 三0.4
a. What is the probapility thatx三0

b. What is the probability thatx > 0?
32. 全a Poisson distributionh 二4

a. What is the probapbility thatx 三 2?
b. What js the probapbiljty thatx 生 2?

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c. What js the probability thatx> 2?                    m her years ol
還 officer at Coast Bank and Trust. Fro                  ble to repay

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she estimates that the probability is .025 that an applicant wi
hs or her jnstajiment loan. Last month she made 40 1
父 What js the probability that three loans will be 和 sfaulted?
紀 What js the probability that at least three loans will be del   tthe rate oftwo per
Automobijles arrive at the Elkhart exit ofthe Indiana Tol 同 ibution
minute. Tne distribution of arrivals approximates a Poisson distri    了人
a.- What is fhe Probabifity that no automopbiles arrive in a particular uiar
Pp. what js fhe Propabjlity that at least one automobile arrives during
mrnute?
5 站5 estimated that 0.5% ofthe Callers to the Customer Service department of Dell

Jnc. wil receive a busy signal. whatis the probability that oftoday's 1,200 callers at
reast 5 received a Pbusy signal?

。 生如e past schools jn Los Angeles Couni
year for weafher enmergencies. What is 1
Counfy wi close for 4 days next year?

24

ty have closed an average of 3 days each
he probability that schools in Los Angeles

opapjlity distribution js a !ting
apjjty associated wjth each Out(

discrete propapjjity distribution can aSsume only certain values. The main features are:
_The sum offhes probabilties is 1.00.

The probapijlity ofa particular outcome is between 0.00 and 1.00.
Jheoutcomes are mutually exclusive.

ontinuous djsfribution can assume an jmfnite number ofvalues within a speecsi

iean and variance ofa probability distribution are Computed as follows,

mean js equalto:

Come-

ific rang

    

variance js egqual to: