In: Statistics and Probability
Consider the independent observations x1, x2, . . . , xn from the gamma distribution with pdf f(x) = (1/ Γ(α)β^α)x^(α−1)e ^(−x/β), x > 0 and 0 otherwise.
a. Write out the likelihood function
b. Write out a set of equations that give the maximum likelihood estimators of α and β.
c. Assuming α is known, find the likelihood estimator Bˆ of β.
d. Find the expected value and variance of Bˆ