How hard is Principles of Statistics DSST?

[Summer18]

I think, based on taking the Stats course through Study.com, that it will be difficult for you.  It has almost nothing to do with anything you've already learned.  It will all be new material, and not easy even if you were a good math student.

I would say that you could take it for free on Khan Academy, at least to the point where you knew enough material to pass the course (meaning you don't have to go through 100% of it).  There are also some YouTube videos you can watch.

are you saying that the DSST stats course will be difficult, has nothing to do with previously learned stuff, and is all new material? or are you saying that study.com's course is all those things?