Readers: I just received an e-mail from FlowingData that I just had to share. This simple visual pretty much makes something that some see as complex very easy to understand. “Type I” and “Type II” errors, names first given by Jerzy Neyman and Egon Pearson to describe rejecting a null hypothesis when it’s true and […]

Andy Cotgreave Andy Cotgreave is Tableau Software’s senior data analyst in the UK. With 16+ years experience battling with good and bad Business Intelligence (BI) tools, Andy has held positions in data analysis, business research and software development. Prior to Tableau, he was a senior data analyst at the University of Oxford. He has also […]