Learning Statistics, Day 6 – Variations

Boo, I just found out that my next module isn't "Information Management and Visualisation" but is, instead "Customer-led Disruption in a Digital Era". Which is fine, I guess. I mean, the assignment at the end is a customer journey, which I can pretty much do in my sleep, and it looks like most of the reading is from business journals, which aren't really difficult reading, but, aw man, I wanted to spend time just making pretty graphs and charts. Oh well. That's what Statistics is for, I guess. VariationSo with the averages, we know what's happening in the centre of the data. But now we need to know what's happening around all the rest of the data set, and how spread out it really is. This is what Variation is all about – measuring how far away the values are from each other. Like how the number of films I've seen from the 1910s is 3 and the number of films I've seen from the 2010s is 461. They are very far away from each other, and that is the Variation I have. Variation can only be…