Data Science Weekly Newsletter - Issue 154

Issue #154

Nov 3 2016

Editor Picks
 
  • Is Bayesian A/B Testing Immune to Peeking? Not Exactly
    Since I joined Stack Exchange as a Data Scientist in June, one of my first projects has been reconsidering the A/B testing system used to evaluate new features and changes to the site. Our current approach relies on computing a p-value to measure our confidence in a new feature. Unfortunately, this leads to a common pitfall in performing A/B testing, which is the habit of looking at a test while it’s running, then stopping the test as soon as the p-value reaches a particular threshold...
  • Ten Ways Your Data Project is Going to Fail
    Data science continues to generate excitement and yet real-world results can often disappoint business stakeholders. How can we mitigate risk and ensure results match expectations? Working as a technical data scientist at the interface between R&D and commercial operations has given me an insight into the traps that lie in our path. I present a personal view on the most common failure modes of data science projects...
  • Predicting the Presidential Election
    With the presidential election less than a week out, I thought it would be fun to make my own predictions about the race. There are plenty of blog and websites that forecast the election, but there aren't that many that tell you how exactly their "secret models" work OR show you how to do it yourself. Well good news is that's exactly what I'm going to do ;)...
 
 

A Message from this week's Sponsor:

 

  • Harness the business power of big data.

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Data Science Articles & Videos

 
  • 5 Simple Math Problems No One Can Solve
    Mathematics can get pretty complicated. Fortunately, not all math problems need to be inscrutable. Here are five current problems in the field of mathematics that anyone can understand, but nobody has been able to solve...
  • Building a (semi) Autonomous Drone with Python
    They might not be delivering our mail (or our burritos--tacocopter.com) yet but drones are now simple, small, and affordable enough that they can be considered a toy. You can even customize and program some of them! The Parrot AR Drone has an API that let's you control not only the drone's movement but also stream video and images from both of its cameras. I'll show you how you can use Python and node.js to build a drone that moves all by itself...
  • Neural Enhance
    As seen on TV! What if you could increase the resolution of your photos using technology from CSI laboratories? Thanks to deep learning and #NeuralEnhance, it's now possible to train a neural network to zoom in to your images at 2x or even 4x...
  • Learning Scalable Deep Kernels with Recurrent Structure
    Many applications in speech, robotics, finance, and biology deal with sequential data, where ordering matters and recurrent structures are common. However, this structure cannot be easily captured by standard kernel functions. To model such structure, we propose expressive closed-form kernel functions for Gaussian processes...
  • Once Again: Prefer Confidence Intervals to Point Estimates
    Today I saw a claim being made on Twitter that 17% of Jill Stein supporters in Louisiana are also David Duke supporters. For anyone familiar with US politics, this claim is a priori implausible, although certainly not impossible. Given how non-credible this claim struck me as being, I decided to look into the origin of this number of 17%...
  • State and National Poll Aggregation
    This is a Stan implementation of Drew Linzer’s dynamic Bayesian election forecasting model, with some tweaks to incorporate national poll data, pollster house effects, correlated priors on state-by-state election results and correlated polling errors...
 
 

Jobs

 
  • Data-Driven Content Developer - Sensor Tower - San Francisco, CA

    Drawing upon the rich data and powerful analysis capabilities of our market intelligence products for the mobile app ecosystem, Sensor Tower’s content developers are part market analyst, part storyteller, and part data evangelist. We’re seeking candidates who share our desire to provide incisive analysis of emerging app trends and key events to industry experts and global media organizations for our growing mobile insights team. If a role that blends data analysis with creating insightful articles, comprehensive reports, and beautiful visualizations sounds like it was made for you, we’d love to talk...
 
 

Training & Resources

 
  • Shepherding Random Numbers
    The following is a tiny guide to shepherding random numbers. Originally I used this as a part of a presentation, but it seemed like it would work well as a little text as well. It does not really deal with statistics or probability, it is simply a collection of a few useful tricks I've learnt for manipulating random numbers...
  • Curated Free Learning Resources
    Curated list of FREE Stats, Data Science and Computer Science lectures separated by category and difficulty level (hover over Free Lectures at top of page)...
 
 

Books

 

 
 
P.S. Interested in reaching fellow readers of this newsletter? Consider sponsoring! Email us for details :) - All the best, Hannah & Sebastian
 
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