(b) The number of traffic accidents that occur in a city within a day has a Poisson distribution a mean value of 2. Also the number of people injured in the different accidents is independently distributed and has a Poisson distribution with mean 3.0. (i) What is the probability of getting (1) two or more accidents in a given day (1I) 5 accidents in a 2- day period? (ii) What is the probability that there is a waiting time more than 1 day before the next accident appears? (ii) Find the mean and the standard deviation of the total number of people injured in one given day.

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Please answer question 6 part b

 

(d) What is the mean recurrence time of E.?
e What is the interpretation of the mean recurrence time?
Question 6
(a) The pgf of a Poisson distribution with parameter A is given by, G(s) = ees]
%3D
Use the pgf to find the mean value and variance of the distribution.
(b) The number of traffic accidents that occur in a city within a day has a Poisson distribution a
mean value of 2. Also the number of people injured in the different accidents is independently
distributed and has a Poisson distribution with mean 3.0.
(i) What is the probability of getting (1) two or more accidents in a given day (1I) 5 accidents in
a 2- day period?
(ii) What is the probability that there is a waiting time more than 1 day before the next accident
appears?
(iii) Find the mean and the standard deviation of the total number of people injured in one given
day.
Question 7
(a) Explain the difference between a stochastic and a deterministic model.
(b) The pgf of the Poisson process at time
with parameter A = 1 and initial population size
N(0) = 2 is given by,
G(s, t) = s?et(s-1)
Use the pgf to find the mean and variance of the distribution at time't'
(c) The differential equations governing the simple birth process (with the usual notations) are;
Pn'(t) = -nà pn (t) + (n – 1)Apn-1(t),
n21
(i)
Po'(t) = 0,
n = 0
(ii)
Use the equation to work out the mean of the distribution using the initial condition
N(0) = a > 0.
Transcribed Image Text:(d) What is the mean recurrence time of E.? e What is the interpretation of the mean recurrence time? Question 6 (a) The pgf of a Poisson distribution with parameter A is given by, G(s) = ees] %3D Use the pgf to find the mean value and variance of the distribution. (b) The number of traffic accidents that occur in a city within a day has a Poisson distribution a mean value of 2. Also the number of people injured in the different accidents is independently distributed and has a Poisson distribution with mean 3.0. (i) What is the probability of getting (1) two or more accidents in a given day (1I) 5 accidents in a 2- day period? (ii) What is the probability that there is a waiting time more than 1 day before the next accident appears? (iii) Find the mean and the standard deviation of the total number of people injured in one given day. Question 7 (a) Explain the difference between a stochastic and a deterministic model. (b) The pgf of the Poisson process at time with parameter A = 1 and initial population size N(0) = 2 is given by, G(s, t) = s?et(s-1) Use the pgf to find the mean and variance of the distribution at time't' (c) The differential equations governing the simple birth process (with the usual notations) are; Pn'(t) = -nà pn (t) + (n – 1)Apn-1(t), n21 (i) Po'(t) = 0, n = 0 (ii) Use the equation to work out the mean of the distribution using the initial condition N(0) = a > 0.
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