Suppose we draw a random sample y1, y2,..,y20
of size 20 from Poisson distribution with parameter 5 i.e., y~rpois(20,5)
. Suppose we got y1=4, y2=7, y3=5,...,y19=3, y20=5
. Then, my problem is, how to draw the samples x1~rexp(y1,2)
, x2~rexp(y2,2)
,...,x20~rexp(y20,2)
so that the sum(x)={sum(x1), sum(x2),...,sum(x20)}
which will be again a random sample? I want to find this sum(x)
and its mean, i.e., mean(sum(x))
and variance ,i.e., var(sum(x))
.
I hope my question is clear to all of you.
Aucun commentaire:
Enregistrer un commentaire