10. Suppose random sampling is from an exponential population distribution representing the waiting time between customer arrivals at a bank, so that the statistical model is given by n

I(x; 0) = o-n

e- Lf=1 x;/8 n 110,00) (Xi )

i=1 for 0 > O.

Problems Your objective is to use an outcome of a random sample of size n In fixed and known) to estimate q(O) =

02 , the variance of waiting times.