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EnginStudent
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Homework Statement
f(x;theta)=Exp(-x+theta)
Find parameter estimates for variable 'theta' using maximum likelihood Estimator and Method of Moments.
Homework Equations
Log(x; theta) = Log(Exp(-x + theta)) -- For MLE
Integral from theta to infinity of (x*Exp(-x + theta)) = xbar -- For Method of Moments
The Attempt at a Solution
I evaluate the log-likelihood function to get Log(L)= -x + theta and then take the derivative of the log-likelihood function with respect to theta. The problem here arises when I take this derivative and set it equal to zero since it gives me 0 = 1 with none of my parameters left in the equation.
In performing the method of moments analysis i get that the estimation for theta is equal to the xbar + 1. Don't know if this is correct, but if someone could help me see what I'm doing wrong with either of these parts it would be most appreciated.