Hi, guys! I hope you're all keeping safe and well.

Can't believe this thread hasn't seen much action lately, so I hope you don't mind my trying to resuscitate this.

I'm currently taking an advanced quantitative research methodology course, and we're doing a module on z-scores. But we're also being taken through some fundamental aspects of multi-variable calculus, though I don't really see how this is directly related to research methodologies. In particular, we're doing an elementary module on squeeze theorem. I've collated some 101-level explainers for this, so if anyone has any similar recommendations, pls pls post here?