so far i know that
f(x) = (1/B) ^n
ln f(x) = n (1/B)
d ln f(x)/ dB = -n/B^2
any suggestions on where i went wrong?
(a) Find the maximum- likelihood estimator for u, the population mean, given a sample of size n from a population with f(x) = 1/B, 0<x<B. Estimate B by the method of moments.
(b)The sample 1.3,0.6,1.7,2.2,0.3,1.1 was drawn from a population with the density f(x) = 1/B, 0<x<B. What are the maximum-likelihood estimates of the mean and variance of the population?
Since the likelihood function is the max occurs when B is as small as possible
which happens when B is the largest order statistic. Since the MLE of B is the largest order stat and the mean is B/2
I guess the estimate you want is the max over 2.