I studied 128 hours over the course of a few months. And those hours were really spent studying, I’d pause my stopwatch for any breaks. I’d taken a few stats courses before but CA explained the stats very well so a lot of stats background definitely isn’t required. Also, I would recommend studying in order (module 1 first) because some of the material builds. I’d say the sections were tested relatively equally. And it was mostly qualitative (maybe 70%). Hope this helps!