In a stochastic process the number of customers which are arriving at a server (during a time intervall) is desribed by a Poisson distribution:
P(n)=exp(-v) * (v^n)/(n!) Each arriving customer has a task to be carried out of which the size (in units) is described by a lognormal distribution: f(u)= exp(-(ln u)^2 / (2*a^2)) / (u*a*SQRT(2*PI)) Question: What is the total number of units (i.e. size of all tasks) requested during the time intervall ? I wonder how these distributions can be concatenated, and if there is a formula for this. Thanks for any help! Jacek Gomoluch ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================