Pierian Data Inc. Science Career Guide Course Guidebook
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Pierian Data Inc. Presents Data Science Career Interview Prep Guide By: Jose Marcial Portilla Copyright Pierian Data Inc. 2018 Page 0 Table of Contents Table of Contents Course Overview Data Science Career Overview DS Career Overview Slides: Why Choose a Career in Data Science? Data Science is Interdisciplinary Data Science Positions and Titles Data Science Interview Preparation Technical Tools of the Trade Theory Knowledge Machine Learning Knowledge Software Knowledge Data Science Interview Process Resumes Interview Process Landing Interviews Negotiating Offers Probability Theory Resources Probability Slides: Probability Question 1 Help - Consecutive Coin Flip Probability Question 2 Help - Dice roll sum of 4 Odds Probability Question 3 Help - Dice roll with at least one 4 Probability Question 4 Help - Red and Blue Marbles Probability Question 5 Help - Odds of Car in 10 Minutes Probability Question 6 Help - Average Flips for 2 Heads in a Row Probability Question 7 Help - 1 Biased Coin of 10 Probability Question 8 Help - Simulating Fair Coin from Biased Coin Probability Question 9 Help - Alice, Odds of having another Girl Statistics Resources Statistic Slides: Statistics Question 1 Help - Raining in Seattle Statistics Question 2 Help - Quantum Messaging Statistics Question 3 Help - Type I vs Type II Errors Copyright Pierian Data Inc. 2018 Page 1 Statistics Question 4 Help - New Virus Test Statistics Question 5 Help - Motor Life Guarantee Product Design and Metrics Resources Product Design and Metrics Slides: Product Design and Metrics Interview Question 1 - FB Messenger Product Design and Metrics Interview Question 2,3,4 - A|B Google Product Design and Metrics Interview Question 5 - Car Gas Usage Working with Data with SQL Resources SQL Interview Question 1 - Query Check SQL Interview Question 2 - Query Check SQL Interview Question 3 - Query Check SQL Interview Question 4 - Employees and Managers SQL Interview Question 5 - Employees and Managers Machine Learning Resources Machine Learning Slides Machine Learning Question 1 - Linear Regression Assumptions Machine Learning Question 2 - Logistic Regression Machine Learning Question 3 - Decision Tree Splits Machine Learning Question 4 - Decision Tree Advantages Machine Learning Question 5 - Random Forest vs Boosting Machine Learning Question 6 - Naive Bayes Assumptions Machine Learning Question 7 - How SVM Works Machine Learning Question 8 - Overfitting Machine Learning Question 9 - Accuracy, Precision, Recall Machine Learning Question 10 - Regression Metrics Design of Experiments Resources Design of Experiments Slides: Design of Experiments Question 1 - A|B Testing Design of Experiments Question 2 - Biases Design of Experiments Question 3 - Multiple Versions of Page Testing Design of Experiments Question 4 Coding Resources Copyright Pierian Data Inc. 2018 Page 2 Copyright Pierian Data Inc. 2018 Page 3 Course Overview Welcome to the course! This guide contains the resources and links mentioned in the lecture in one convenient location. If during the course videos you hear us mention resources or links, just open up this guidebook to find them! You can use the Table of Contents as links to directly jump to whatever location you need to go to. Best of luck on your data science journey! If you ever have a need for corporate training, feel free to reach us at training@pieriandata.com. Copyright Pierian Data Inc. 2018 Page 4 Data Science Career Overview DS Career Overview Slides: https://docs.google.com/presentation/d/1V1GDbnU00fZbejq3U61e3D-TgB0FxkyrlyURpDtAEH8/e dit?usp=sharing Why Choose a Career in Data Science? Deciding on a Data Science Career: https://www.kdnuggets.com/2014/03/data-scientist-right-career-path-candid-advice.html http://www.datacenterjournal.com/consider-career-data-science/ Data Science is Interdisciplinary Overviews of Data Science: https://datascience.nyu.edu/what-is-data-science/ https://en.wikipedia.org/wiki/Data_science Data Science Positions and Titles Large list of various job titles: https://www.datasciencecentral.com/profiles/blogs/job-titles-for-data-scientists https://www.datasciencecentral.com/profiles/blogs/400-categorized-job-titles-for-data-scientists Thoughts on Higher Education Other opinions on higher education: https://www.kdnuggets.com/2014/06/masters-degree-become-data-scientist.html Copyright Pierian Data Inc. 2018 Page 5 Data Science Interview Preparation Technical Tools of the Trade Python: https://www.python.org/ R: https://www.r-project.org/about.html Theory Knowledge Free Online Stats Books: http://onlinestatbook.com/ https://www.openintro.org/stat/textbook.php Machine Learning Knowledge Great Book on Machine Learning (Free): http://www-bcf.usc.edu/~gareth/ISL/ISLR%20Seventh%20Printing.pdf Software Knowledge Tableau: https://www.tableau.com/ Copyright Pierian Data Inc. 2018 Page 6 Data Science Interview Process Resumes Example Data Science Resume: http://will-stanton.com/creating-a-great-data-science-resume/ https://docs.google.com/document/d/1ktqmnyG8olnZ24DqJZ3G9h619ng-JYeiY6gNh-i_Q6o/edit https://www.monster.com/career-advice/article/data-scientist-resume-sample Interview Process AirBnb’s Interview Process: https://medium.com/@AirbnbCandidateJourney/leveling-the-playing-field-an-overview-of-airbnb-s -data-science-interview-process-bd0660b77a17 Nice Guide to Interviews: https://www.linkedin.com/pulse/how-ace-data-science-interview-vin-vashishta/ Someone’s experience with DS Interviews https://alyaabbott.wordpress.com/2014/10/01/how-to-ace-a-data-science-interview/ Nice write ups on other individual's process: https://medium.com/@XiaohanZeng/i-interviewed-at-five-top-companies-in-silicon-valley-in-five-d ays-and-luckily-got-five-job-offers-25178cf74e0f More thoughts on interviews: https://www.quora.com/How-do-I-prepare-for-a-data-scientist-interview Copyright Pierian Data Inc. 2018 Page 7 Landing Interviews Experience Essay Blog Post: http://www.erinshellman.com/crushed-it-landing-a-data-science-job/ General Discussion: http://treycausey.com/data_science_interviews.html Nide Guide: http://data-informed.com/six-secrets-to-landing-a-job-in-data-science/ Negotiating Offers Guides for Salary Negotiation: https://www.nerdwallet.com/blog/loans/student-loans/negotiate-salary-evaluate-offer/ https://www.themuse.com/advice/how-to-negotiate-salary-37-tips-you-need-to-know https://www.thebalance.com/salary-negotiation-tips-how-to-get-a-better-offer-2063439 https://www.washingtonpost.com/graphics/business/womens-wages/salary-negotiation-guide-wo men/ Copyright Pierian Data Inc. 2018 Page 8 Probability Theory Resources Probability Slides: https://docs.google.com/presentation/d/13M9iCeBU8fngtU4tzjudMCmmP6Fd3BsCUuycCuH3PlE/ edit?usp=sharing Probability Question 1 Help - Consecutive Coin Flip https://math.stackexchange.com/questions/112726/coin-tossed-until-two-consecutive-heads-or-tai ls-appear https://en.wikipedia.org/wiki/Geometric_series#Sum https://en.wikipedia.org/wiki/Expected_value#Finite_case Probability Question 2 Help - Dice roll sum of 4 Odds http://alumnus.caltech.edu/~leif/FRP/probability.html Probability Question 3 Help - Dice roll with at least one 4 http://alumnus.caltech.edu/~leif/FRP/probability.html Probability Question 4 Help - Red and Blue Marbles https://www.techinterview.org/post/526363745/red-marbles-blue-marbles/ Probability Question 5 Help - Odds of Car in 10 Minutes https://www.quora.com/If-the-probability-of-observing-a-car-in-30-minutes-on-a-highway-is-0-95what-is-the-probability-of-observing-a-car-in-10-minutes-assuming-constant-default-probability https://math.stackexchange.com/questions/52113/probability-calculations-on-highway Probability Question 6 Help - Average Flips for 2 Heads in a Row https://www.codechef.com/wiki/tutorial-expectation https://courses.cit.cornell.edu/info2950_2012sp/mh.pdf Copyright Pierian Data Inc. 2018 Page 9 Probability Question 7 Help - 1 Biased Coin of 10 https://en.wikipedia.org/wiki/Bayes%27_theorem Probability Question 8 Help - Simulating Fair Coin from Biased Coin http://www.eecs.harvard.edu/~michaelm/coinflipext.pdf https://jeremykun.com/2014/02/08/simulating-a-fair-coin-with-a-biased-coin/ Probability Question 9 Help - Alice, Odds of having another Girl https://math.stackexchange.com/questions/15055/in-a-family-with-two-children-what-are-the-chan ces-if-one-of-the-children-is-a Copyright Pierian Data Inc. 2018 Page 10 Statistics Resources Statistic Slides: https://docs.google.com/presentation/d/1VCLkMu3CRTuSN-nC4EaPVwhXd9a_0p-4S-ci5FJRJKI/e dit?usp=sharing Statistics Question 1 Help - Raining in Seattle https://www.mathsisfun.com/data/probability-tree-diagrams.html Statistics Question 2 Help - Quantum Messaging https://www.intmath.com/counting-probability/12-binomial-probability-distributions.php Statistics Question 3 Help - Type I vs Type II Errors https://en.wikipedia.org/wiki/Type_I_and_type_II_errors Statistics Question 4 Help - New Virus Test https://www.math.hmc.edu/funfacts/ffiles/30002.6.shtml Statistics Question 5 Help - Motor Life Guarantee http://www.z-table.com/ https://statistics.laerd.com/statistical-guides/normal-distribution-calculations.php Copyright Pierian Data Inc. 2018 Page 11 Product Design and Metrics Resources Product Design and Metrics Slides: https://docs.google.com/presentation/d/1pY15hTUjMyzDEI-RenE-hvwJsfZNIJCp4TRVkGsLR0o/edi t?usp=sharing Product Design and Metrics Interview Question 1 - FB Messenger https://savvyapps.com/blog/mobile-app-analytics Product Design and Metrics Interview Question 2,3,4 - A|B Google https://en.wikipedia.org/wiki/A/B_testing https://www.pardot.com/blog/abcs-ab-testing/ http://online-behavior.com/testing/advanced-ab-testing-tactics-1356 Product Design and Metrics Interview Question 5 - Car Gas Usage https://www.glassdoor.com/Interview/business-sense-There-are-two-types-of-cars-A-and-B-The-n umber-of-people-in-US-who-use-A-and-B-are-the-same-They-driv-QTN_831574.htm Copyright Pierian Data Inc. 2018 Page 12 Working with Data with SQL Resources SLIDES: https://docs.google.com/presentation/d/1YXmZ1Uu9TL5ckxNOk8c7k8a6dd3Lk_DbG30hOPatQV g/edit?usp=sharing SQL Interview Question 1 - Query Check https://www.w3schools.com/sql/sql_alias.asp SQL Interview Question 2 - Query Check https://www.w3schools.com/sql/sql_groupby.asp SQL Interview Question 3 - Query Check https://www.w3schools.com/sql/sql_having.asp SQL Interview Question 4 - Employees and Managers https://www.w3schools.com/sql/default.asp SQL Interview Question 5 - Employees and Managers https://www.w3schools.com/sql/sql_join.asp Copyright Pierian Data Inc. 2018 Page 13 Machine Learning Resources Machine Learning Slides https://docs.google.com/presentation/d/1VvSWus6sjXEV7WG7FuH__Pi5rwB0_WlKc7A5Whx5gV g/edit?usp=sharing Machine Learning Question 1 - Linear Regression Assumptions http://www.statisticssolutions.com/assumptions-of-linear-regression/ http://r-statistics.co/Assumptions-of-Linear-Regression.html https://stats.stackexchange.com/questions/16381/what-is-a-complete-list-of-the-usual-assumption s-for-linear-regression Machine Learning Question 2 - Logistic Regression https://en.wikipedia.org/wiki/Logistic_regression http://dataaspirant.com/2017/03/02/how-logistic-regression-model-works/ Machine Learning Question 3 - Decision Tree Splits https://en.wikipedia.org/wiki/Information_gain_in_decision_trees http://dni-institute.in/blogs/cart-decision-tree-gini-index-explained/ https://link.springer.com/article/10.1023/B:AMAI.0000018580.96245.c6 Machine Learning Question 4 - Decision Tree Advantages https://en.wikipedia.org/wiki/Decision_tree_learning http://www.brighthubpm.com/project-planning/106000-advantages-of-decision-tree-analysis/ http://www.simafore.com/blog/bid/62333/4-key-advantages-of-using-decision-trees-for-predictive -analytics Copyright Pierian Data Inc. 2018 Page 14 Machine Learning Question 5 - Random Forest vs Boosting http://fastml.com/what-is-better-gradient-boosted-trees-or-random-forest/ https://www.quora.com/When-would-one-use-Random-Forests-over-Gradient-Boosted-MachinesGBMs https://discuss.analyticsvidhya.com/t/what-is-the-fundamental-difference-between-randomforest-a nd-gradient-boosting-algorithms/2341 https://stats.stackexchange.com/questions/173390/gradient-boosting-tree-vs-random-forest Machine Learning Question 6 - Naive Bayes Assumptions https://nlp.stanford.edu/IR-book/html/htmledition/properties-of-naive-bayes-1.html https://en.wikipedia.org/wiki/Naive_Bayes_classifier Machine Learning Question 7 - How SVM Works https://en.wikipedia.org/wiki/Support_vector_machine Machine Learning Question 8 - Overfitting https://en.wikipedia.org/wiki/Overfitting https://www.quora.com/What-is-an-intuitive-explanation-of-over-fitting-particularly-with-a-small-sa mple-set-What-are-you-essentially-doing-by-over-fitting-How-does-the-over-promise-of-a-high-R% C2%B2-low-standard-error-occur Machine Learning Question 9 - Accuracy, Precision, Recall https://en.wikipedia.org/wiki/Precision_and_recall Machine Learning Question 10 - Regression Metrics https://people.duke.edu/~rnau/compare.htm Copyright Pierian Data Inc. 2018 Page 15 Design of Experiments Resources Design of Experiments Slides: https://docs.google.com/presentation/d/1mmfJyhApROEfTZrNAIFlGJfS0lRDsJXD3Fr2WhhgxEI/ed it?usp=sharing Design of Experiments Question 1 - A|B Testing https://www.optimizely.com/optimization-glossary/ab-testing/ https://en.wikipedia.org/wiki/A/B_testing Design of Experiments Question 2 - Biases https://en.wikipedia.org/wiki/Bias_(statistics) http://www.statisticshowto.com/what-is-bias/#Availability Design of Experiments Question 3 - Multiple Versions of Page Testing https://en.wikipedia.org/wiki/Multi-armed_bandit https://www.searchenginepeople.com/blog/16072-multi-armed-bandits-ab-testing-makes-money. html Design of Experiments Question 4 http://rpsychologist.com/d3/NHST/ https://onlinecourses.science.psu.edu/stat414/book/export/html/245 https://en.wikipedia.org/wiki/Statistical_power Copyright Pierian Data Inc. 2018 Page 16 Coding Resources Coding Slides https://docs.google.com/presentation/d/15SCi6Fpjq0edRYhM5w7GDZBm3kdeUsWg8kSEHVziYZ g/edit?usp=sharing Coding Interview Question 1 - Largest Continuous Sum Solution Link in Python: https://gist.github.com/Pierian-Data/51202d7a84e36537df97a7c9ca78061f Coding Interview Question 2 - String Compression Solution Link in Python: https://gist.github.com/Pierian-Data/4c85a5adc36a282223065d52cc178595 Coding Interview Question 3 - Stock Prices Solution Link in Python: https://gist.github.com/Pierian-Data/a17fd7357aeb919306864fe435e6ed15 Coding Interview Question 4 - Missing Element Solution Link in Python: https://gist.github.com/Pierian-Data/eaa589bb6ad88a5ec00b42d8d0f29328 Copyright Pierian Data Inc. 2018 Page 17
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