No problem, yes it is possible but you need to take GRE. this is very simple and straight forward. Even you apply for phd, you always have to go through  some Master courses first and then you have to pass qualifying exams and then you will be phd candiate. it depends on you how long it is going to take to finish phd. The good part is if you do good, university will support you financially through out your phd career. I am expecting p hd admission in statistics with full financial support offer with in this week.