I'm of the belief that tags should be used to describe the content in a way that is understood by everyone. The word "beginner" and similar words (I've seen "fundamental" and "fundamentals" thrown out as ideas, too) has no meaning that is shared across a population. What is a "beginner" question to you might be extremely complex to me.
Specifically from a statistical standpoint, my strength is in engineering statistics - applying statistical methodologies to engineering problems, especially in the software engineering field through various metrics and measurements and analysis of this data. A lot of stuff that is very "beginner" to some people who specialize in statistical analysis is very complicated to me - I took one course on probability and statistics and one course in engineering statistics, everything else I know is self-taught. Other people are in similar boats.
So let's just end this now and not use the "beginner" tag, but focus on quality questions that clearly state the level of previous understanding the asker as and amount of depth the asker expects from answers. This probably means using comments and editing questions (especially by people who aren't the author), but that's really the point of the ability to edit anyway.
Thanks for hearing me out!