Simply Statistics A statistics blog by Rafa Irizarry, Roger Peng, and Jeff Leek

Palantir Shows Its Cards File this under long-term followup, but just about four years ago I wrote about Palantir, the previously secretive but now soon to be public data science company, and how its valuation was a commentary on the value of data science more generally. Well, just recently Palantir filed to go public and therefore submitted a registration statement (S-1) describing its business. It’s a fascinating read, if you’re into that kind of stuff. Read more

Asymptotics of Reproducibility Every once in a while, I see a tweet or post that asks whether one should use tool X or software Y in order to “make their data analysis reproducible”. I think this is a reasonable question because, in part, there are so many good tools out there! This is undeniably a good thing and quite a contrast to just 10 years ago when there were comparatively few choices. The question of toolset though is not a question worth focusing on too much because it’s the wrong question to ask. Read more

Amplifying people I trust on COVID-19 Like a lot of people, I’ve been glued to various media channels trying to learn about the latest with what is going on with COVID-19. I have also been frustrated - like a lot of people - with misinformation and the deluge of preprints and peer reviewed material. Some of this information is critically important and some is hard to trust. As a biostatistician at a very visible school of public health I have also had a number of media outreaches, but I’ve been hesitant to do any interviews or talk about COVID-19. Read more

Is Artificial Intelligence Revolutionizing Environmental Health? NOTE: This post was written by Kevin Elliott, Michigan State University; Nicole Kleinstreuer, National Institutes of Health; Patrick McMullen, ScitoVation; Gary Miller, Columbia University; Bhramar Mukherjee, University of Michigan; Roger D. Peng, Johns Hopkins University; Melissa Perry, The George Washington University; Reza Rasoulpour, Corteva Agriscience, and Elizabeth Boyle, National Academies of Sciences, Engineering, and Medicine. The full summary for the workshop on which this post is based can be obtained here. Read more

You can replicate almost any plot with R Although R is great for quickly turning data into plots, it is not widely used for making publication ready figures. But, with enough tinkering you can make almost any plot in R. For examples check out the flowingdata blog or the Fundamentals of Data Visualization book. Here I show five charts from the lay press that I use as examples in my data science courses. In the past I would show the originals, but I decided to replicate them in R to make it possible to generate class notes with just R code (there was a lot of googling involved). Read more

So You Want to Start a Podcast Podcasting has gotten quite a bit easier over the past 10 years, due in part to improvements to hardware and software. I wrote about both how I edit and record both of my podcasts about 2 years ago and, while not much has changed since then, I thought it might be helpful if I organized the information in a better way for people just starting out with a new podcast. Read more

The data deluge means no reasonable expectation of privacy - now what? Today a couple of different things reminded me about something that I suppose many people are talking about but has been on my mind as well. The idea is that many of our societies social norms are based on the reasonable expectation of privacy. But the reasonable expectation of privacy is increasingly a thing of the past. Three types of data I’ve been thinking about are: Obviously identifying data: Data like cellphone GPS traces and public social media posts are obviously information that is indentifiable and reduce privacy. Read more

More datasets for teaching data science: The expanded dslabs package Introduction We have expanded the dslabs package, which we previously introduced as a package containing realistic, interesting and approachable datasets that can be used in introductory data science courses. This release adds 7 new datasets on climate change, astronomy, life expectancy, and breast cancer diagnosis. They are used in improved problem sets and new projects within the HarvardX Data Science Professional Certificate Program, which teaches beginning R programming, data visualization, data wrangling, statistics, and machine learning for students with no prior coding background. Read more

Research quality data and research quality databases When you are doing data science, you are doing research. You want to use data to answer a question, identify a new pattern, improve a current product, or come up with a new product. The common factor underlying each of these tasks is that you want to use the data to answer a question that you haven’t answered before. The most effective process we have come up for getting those answers is the scientific research process. Read more

I co-founded a company! Meet Problem Forward Data Science I have some exciting news about something I’ve been working on for the last year or so. I started a company! It’s called Problem Forward data science. I’m pumped about this new startup for a lot of reasons. My co-founder is one of my families closest friends, Jamie McGovern, who has more than 2 decades of experience in the consulting world and who I’ve known for 15 years. We are creating a cool new model of “data scientist as a service” (more on that below) We have a problem forward, not solution backward approach to data science that grew out of the Hopkins philosophy of data science. Read more