Hi there, this is indeed the place to ask all questions. Welcome to the course and thank you for reaching out.
In that lesson it wasn’t “mass statistics” I mentioned, it was “having an understanding of maths and statistics”. I say this because as you dig deeper into more advanced technical analysis, it can become a quantitative study of statistical modelling of price action so a good understanding of maths and statistics will help you absorbs those techniques much more easily. But at this stage, in this course, a simple understanding of maths and statistics will help you to be able to calculate percentages when deciding things like stop losses and take profit targets.
I hope that helps.