I am in the middle of my master studies in math and need to decide which subject I want to choose for my master thesis, geometry or statistics. I have the following questions:

Is it possible to start the PhD (say in statistics) in a different subject as the master/master thesis (say in geometry)?

What actions would you recommand, if I want to change the subject? (e.g. first taking a job in statistical area before starting a PhD in this subject)

Would it make sense to do another master in statistics?

I thought going from the more theoretical subject geometry to the more applied subject statistics more “natural”.

Note that I have in both subjects, geometry and statistics, at least 30 Credits, but my studies (also my Bachelor) is more focused on geometry.