This is a well made website. I love the design and how fast it is. The only problem I have is that you can only seem to link to chapters but not paragraphs in the chapters. You sorta can with appending section1,section2, etc to the url as a hash but it's a bit off.
This is really good. I'm fairly well versed in these topics already but I've sent this off to some friends who have only recently started their CS studies.
Did anyone else find the variance illustration completely baffling? It's got little to do with an intuitive feel for the variation in outcome for a random variable