You don't necessarily need grad school for statistics, but a lot of people choose to do a Master's anyway. uWaterloo would probably be the best in Canada for stats because of their reputed math faculty and their co-op program. After that it kinda depends on you personally. I think UTSC stats is a pretty decent program career outcome wise. The other campuses apparently have incompetent stat departments. You can also look into uOttawa or Carleton, because I think the government employees a lot of data analysts and those schools have the co-op to get you there. Western is also decent from what I've heard. But uWaterloo would probably be the best