# Math Help - Maximum Likelihood Estimator

1. ## Maximum Likelihood Estimator

Im not sure how to work out a),ive got some stuff in my revision notes for the rest of the question but i dont want to start the question off from the wrong answer for a,

2. This is a gamma density with $\alpha=4$

$C= {1\over \Gamma(\alpha)\beta^{\alpha}} = {1\over 3!\beta^4}$

The MLE of $\beta$ is $\bar X/4$