After BSc statistics you will have plenty of options and you have to choose wisely. You can do M.Sc statistics from IIT by qualifying IIT JAM, or you can go for Actuarial Sciences as well. Actuarial science is for those who have interest in the field of stats, economics and finance. If you have interest in Management studies, then you should go for MBA. You can also do Master of Computer Applications (MCA) or Masters of Science in Mathematics or MSc in quantitative economics.