A Taste of Data Science Michael Clarkson NACS Executive Leadership Program at Cornell August 2019 Download these slides at https://tinyurl.com/TasteDataScience
Computer Business Science Data Science Statistics Diagram inspired by h"p://drewconway.com/zia/2013/3/26/the-data-science-venn-diagram
Michael Clarkson, PhD Senior Lecturer in Computer Science Cornell University Launched Data Science For All at Cornell
Photo: http://100photos.time.com/photos/andreas-gursky-99-cent
$ Image: https://pixabay.com/photos/data-computer-internet-online-www-2899901/
Photo: https://www.flickr.com/photos/robertnelson/29699674200 https://blog.blueapron.io/forecasting-demand-at-blue-apron-ba62d6af5da2 h"ps://www.forbes.com/sites/stevebanker/2018/01/02/data-science-and-the-meal-kit-subscrip>on-business-model
Photo: https://stories.starbucks.com/stories/2016/starbucks-mobile-app-launches-in-indonesia h"ps://www.forbes.com/sites/bernardmarr/2018/05/28/starbucks-using-big-data-analy@cs-and-ar@ficial-intelligence-to-boost-performance https://www.forbes.com/sites/bernardmarr/2018/04/04/how-mcdonalds-is-getting-ready-for-the-4th-industrial-revolution-using-ai-big-data-and-robotics https://www.wired.com/story/mcdonalds-big-data-dynamic-yield-acquisition/ h"ps://www.reuters.com/ar@cle/us-mcdonalds-mobile-idUSKBN16L2RM
Photo: https://www.uber.com/en-BE/blog/ubereats-antwerp h"ps://www.wired.com/story/how-data-helps-deliver-your-dinner-on-8me-warm h"ps://www.eater.com/2018/10/24/18018334/uber-eats-virtual-restaurants h"ps://venturebeat.com/2018/10/02/uber-eats-and-the-6b-bookings-run-rate-the-ai-success-story-no-one-is-talking-about
Data science is the key to personalized consumer experience and e ffi cient operations at scale
What is data science? Answering questions from data using computation
Ask Question Understand Obtain World Data Understand Data
Example: Grocery Delivery What questions would you ask? What data would you obtain?
3,000,000 orders 200,000 customers 2017 Public Dataset https://tech.instacart.com/3-million-instacart-orders-open-sourced-d40d29ead6f2
Photo: https://pxhere.com/en/photo/940160
In- quantifying reliability ference Prediction making guesses Exploration identifying patterns
In- quantifying reliability ference Prediction making guesses Exploration identifying patterns DEMO
Data scientists… • Organize: collect and clean data • Discover and communicate: explore, program, and visualize • Automate: separate data files from analyses for repeatability
In- quantifying reliability ference Prediction making guesses Exploration identifying patterns DEMO
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Program Input Output Image: https://en.wikipedia.org/wiki/File:Computer.svg Photo: https://www.flickr.com/photos/nihgov/23682213069 Explanation (Prof. Weinberger): http://www.cs.cornell.edu/courses/cs4780/2018fa/lectures/lecturenote01_MLsetup.html
✔ ❌ ❌ …
Data Program ✔ ❌ ❌ Input Output ✔
Machine Learning: Programs that improve on some task with experience https://commons.wikimedia.org/wiki/File:Backgammon_lg.jpg https://pixabay.com/vectors/email-mail-spam-message-e-mail-29853/ https://pixabay.com/vectors/car-automobile-tesla-autonomous-2692593/
Artificial Intelligence Machine Learning https://www.freepik.com/free-photo/3d-render-male-head-showing-brain_1111538.htm
Beyond bananas… Photo: https://pixabay.com/illustrations/bananas-fruit-yellow-plant-food-3735673/
Nearest neighbors algorithm To make a recommendation for bananas to Alice: • Find the 3 “most similar” customers to Alice • Have them majority vote on whether they would recommend bananas • Use that decision Image: https://alliance.seas.upenn.edu/~cis520/dynamic/2016/wiki/index.php?n=Lectures.LocalLearning
Data scientists… • Train computers: use data to “teach” computer how to do task • Predict: given a never-before-seen input, find right output
In- quantifying reliability ference Prediction making guesses Exploration identifying patterns DEMO
Data scientists… • Are skeptical: always ask, “could it be just random chance?” • Explain uncertainty: provide answer + estimate of “how right” answer is
In- quantifying reliability ference Prediction making guesses Exploration identifying patterns
Privacy Photo: https://pixabay.com/illustrations/mobile-security-privacy-protected-3469818/
Photo: http://faqhow.com/other/any/how-target-predicted-a-girls-pregnancy-before-her https://www.forbes.com/sites/kashmirhill/2012/02/16/how-target-figured-out-a-teen-girl-was-pregnant-before-her-father-did
Photo: h'ps://www.wired.com/2010/03/ne8lix-cancels-contest
Privacy concerns • Governments/businesses and individuals are sometimes at odds over how identity is used • Intrinsic privacy: the individual's right to be left alone • Informational privacy: the individual's right to determine for itself when, how, and to what extent information about it is communicated to others
Ethical data scientists… • Seek consent • Select minimal identity • Limit storage • Avoid linking http://www.cs.cornell.edu/fbs/publications/chptr.AuthPeople.pdf
Computer Business Science Data Science Statistics Diagram inspired by http://drewconway.com/zia/2013/3/26/the-data-science-venn-diagram
Photo: h'ps://news.cornell.edu/stories/2019/05/cornell-celebrate-151st-commencement
Acknowledgments CS 1380 Data Science For All Cornell University Michael Clarkson and Madeleine Udell Data 8 Foundations of Data Science University of California, Berkeley Ani Adhikari and John DeNero
A Taste of Data Science Michael Clarkson NACS Executive Leadership Program at Cornell August 2019 Download these slides at https://tinyurl.com/TasteDataScience
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