Hello Samarasimha,

YES, you can MS in UA after completing Bsc in Statistics. . All you have to do is score good marks in your PG and prepare for GRE. You should also decide upon the country and the university in which you are going to study.

Furthermore, the requirements to pursue MS in USA are as follows :

• 3 to 4 years bachelors degree in relevant field.
• 3.5 or higher GPA, equivalent to 87% in bachelors.
• GRE score of 330 or above.
• Statement of Purpose.
• Research Internships/ Published Research Papers.
• Project work/Seminars.
• 2-3 Letter of Recommendation.
• Social & Leadership Activities.

Further, requirements for Software jobs in USA are as follows :

• Enroll in a software development program. The first step to becoming a software engineer is to enroll in a software development degree program. ...
• Gain internship experience. ...
• Choose your specialty. ...
• Pursue industry certifications. ...
• Continue your education.

I hope that this will help.