Why You Shouldn’t Draw Trend Lines on Graphs

Guest essay by Kip Hansen What we call a graph is more properly referred to as “a graphical representation of data.”  One very common form of graphical representation is “a diagram showing the relation between variable quantities, typically of two variables, each measured along one of a pair of axes at right angles.” Here at…

Advertisements

The ‘Trick’ of Anomalous Temperature Anomalies

Guest Essay by Kip Hansen   It seems that every time  we turn around, we are presented with a new Science Fact that such-and-so metric — Sea Level Rise, Global Average Surface Temperature, Ocean Heat Content, Polar Bear populations, Puffin populations — has changed dramatically — “It’s unprecedented!” — and these statements are often backed…

'Robust' analysis isn't what it is cracked up to be: Top 10 ways to save science from its statistical self

In the wake of what Willis recently pointed out from Nassim Taleb, about how “In fact errors are so convex that the contribution of a single additional variable could increase the total error more than the previous one.”, I thought it relevant to share this evisceration of the over-reliance on statistical techniques in science, especially…

A Way To Calculate Effective N

Guest Post by Willis Eschenbach One of the best parts of writing for the web is the outstanding advice and guidance I get from folks with lots of experience. I recently had the good fortune to have Robert Brown of Duke University recommend a study by Demitris Koutsoyiannis entitled The Hurst phenomenon and fractional Gaussian…