An interactive computer system is available at a large installation. Let X denote the number of requests for this system received per hour. Assume that X has a Poisson distribution with parameter As. These data are obtained:
25 20 20
30 24 15
10 23 4
(a) Find an unbiased estimate for Xs.
(b) Find an unbiased estimate for the average number of requests received per hour.
(c) Find an unbiased estimate for the average number of requests received per quarter hour.