Previously I mentioned that online statistics learning resources are not abundant.

Well, here is a new online book for learning statistics. It is geared towards programmers, and it looks to be a great fit for people wanting to learn data science.  Here is a small excerpt from the Preface:

It emphasizes the use of statistics to explore large datasets.

I have only had time to quickly browse the book, but it looks quite good.

Think Stats: Probability and Statistics for Programmers

(The book has a Creative Commons license, so it is free and OK to download)