The Formula for the Slope of a Linear Regression Line. It’s Greek to Me.
(Get it? Greek? Sigh. Anyway, click the image to view the article on StatisticsHowTo.com)
In Case of Emergency, Call JT Statmaster!
I struggle mightily to understand formulas expressed as Greek symbols. I don’t know why really. Probably because it seems so abstract – that notation sacrifices “humanity” in order to achieve precision and uniformity. I get that, but it doesn’t make it easy for me.
Fortunately, we have people like JT Joyner. JT was a student in one of my classes late last year. And I dare say he was one of those “star pupils.” He took to Power Pivot like a natural. So natural, in fact, that a couple days after the class, he emailed me a Linear Regression workbook example, implemented in Power Pivot measures. He translated Greek into, you know, formulas.
Six months later, yeah, I am just getting around to doing something with it. But this is exciting stuff for sure. I’m pumped. Let’s dig in.