Learning Data Science, Day 5 – Standard Deviation and Coefficent of Variation

Yesterday was a total write-off, and today wasn't looking so hot either. I just got a Fairphone, and I'm doing all the transferring over and trying to figure out how to make things like they were on my Samsung and going "Why the hell did you duplicate everything on my SD card to the actual phone" and "Where the hell are my podcasts" and "Why aren't the widgets loading" and...well...I'm going to take a break before I end up breaking something. So, instead, more data science! Because that won't annoy me at all! Standard DeviationStandard deviation is apparently "a number that describes how spread out the observations are". That means nothing to me. But, actually, what they mean is that maths has difficulties predicting precise values. Like, sure, you know that you watched three movies from the 1910s on Talking Pictures TV, but even if you predict that, in the future, you'll watch three more movies, that doesn't mean you actually will. You might watch one. Or none. Or they'll have an…