You have completed your Master's in statistics. And you want
us to tell
you what topic you should choose for your research? We can help you write up your research. We can even help you choose among possible topics, assisting you in determining which are feasible and which might be too hard for you to do. But, as the one with an advanced degree in statistics who will be doing the research, you've got to identify topics that are (a) of interest to you, and (b) can be investigated by means that are within your skill-set.
Simone, EssayForum.com