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leonardo auslender commented on Lee Baker's blog post Statistics is Dead – Long Live Data Science…
"NOOOOOOOO, they promised me that I could perform brain surgery by reading it from the Web!! I want my money back. "
Jul 27, 2016
leonardo auslender commented on Shahram Abyari's blog post Resolving Skewness
""The fundamental assumption in many predictive models is that the predictors have normal distributions." Which methods? Trees, OLS and others do not require this assumption. Could you explain? Thanks.  "
Dec 28, 2015
leonardo auslender commented on Gridlex's blog post Calculate Cosine Similarity Using Scipy – Data Sets & Sample Code
"Thanks, this is the definition of correlation between two variables."
Apr 20, 2015
leonardo auslender commented on Kumaran Ponnambalam's blog post Impact of target class proportions on accuracy of classification
"Precision is the probability of event among those that you forecast as event, and similarly for non-events. It's the bayesian posterior of accuracy, and in common usage, it's the foundation of lift tables. Accuracy is important in models…"
Mar 24, 2015
leonardo auslender commented on Kumaran Ponnambalam's blog post Impact of target class proportions on accuracy of classification
"Some observations: 1) accuracy is not that interesting in a business setting. Can you give measures of precision? 2) you don't mention which classifier you used, or maybe I skipped that part. 3) in relation to 2), Owen in a 2007 paper shows…"
Mar 23, 2015
leonardo auslender is now a member of Data Science Central
Feb 16, 2012

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