Which course is better after completing B.Sc statistics among MBA and MCA? I am interested in coding, computers and mobile development.

As you mentioned, you are interested in coding, mobile development, programming then I would suggest you go for MCA. Master of Computer Application MCA with the IT boom dominating Indian economy, computer applications and IT industry has emerged as one of the most lucrative career options available

As stated, you are interested in coding, computers and mobile development. MCA would be a better choice, as this would give you placements in this field. MBA on the other hand would give you job in management.