Add comments (and answer them) within problem sets

One student had requested access to edit the problem sets. While for obvious reasons we cannot grant students the ability to change these problem sets, we can let you attach comments within. This works somewhat similarly to the the "track changes" program in word processing programs. Ask a Question Within the problem set, highlight the … Continue reading Add comments (and answer them) within problem sets

What goes in the denominator of variance & standard deviation

We've gotten a few questions on the problem set for the central tendency and variance module, specifically what goes in the denominator. In some places it seems like we say put N in others we say put n-1. And that answer is right... but of course it's more complicated than that. I put an explanation … Continue reading What goes in the denominator of variance & standard deviation