Lisa CheninTowards Data ScienceUsing SQL to calculate trends based on historical statusTime series analysis is driven by activity timestamps. How can we capture trends in things that were present, but had no activity?Aug 9, 2022Aug 9, 2022
Lisa CheninTowards Data ScienceSybill Trelawney and the Confidence Interval ConundrumIn which we learn what confidence intervals are, why we use them, how to calculate them, and help Dumbledore with performance reviews.Aug 4, 2020Aug 4, 2020
Lisa CheninTowards Data ScienceExplaining Linear Regression to Michael ScottExplaining how to calculate and interpret linear regression and r-squared like we are 8(ish).Jul 12, 2020Jul 12, 2020
Lisa CheninTowards Data ScienceHow to Interpret and Calculate “X Times More Likely” StatisticsWalk through of how to calculate and use odds likelihood ratios, while avoiding sensationalism or misreporting.Jul 8, 20202Jul 8, 20202
Lisa CheninTowards Data ScienceHow to Test for Statistically Significant Relationships Between Categorical Variables with Chi…Tutorial for chi-square and post hoc testing in Python to understand statistically significant relationships between categorical variables.Jul 1, 20204Jul 1, 20204
Lisa CheninThe StartupWilly Wonka and the Data Driven Chocolate FactoryThere is a group of chocolate aficionados in New York called the Manhattan Chocolate Society. They get together every so often to taste…Jun 22, 2020Jun 22, 2020
Lisa ChenData Diaries: a Month in the Life of a Baker turned Management ConsultantOne of the top 5 times I’ve been most proud to call someone my friend happened in October of 2018, when one of my friends — lets call her…Jun 6, 2020Jun 6, 2020
Lisa CheninTowards Data ScienceLose-the Vuitton: Do People Still Care About Luxury Goods During a Global Pandemic?With the help of Google Trends data and some creative search queries, I plan to find out.May 28, 2020May 28, 2020
Lisa CheninThe StartupData for Humans: Visualizing Permanent Small Business Closures in Toronto from March — MayThis visualization was difficult in both execution and subject matter. It was partially inspired by a conversion I had with my friend who…May 24, 2020May 24, 2020
Lisa CheninTowards Data ScienceData Visualization for Humans: How I Turned my Data into Watercolour ArtHave you ever listened to a stranger talk and felt like somehow, they were expressing thoughts you didn’t even know you had? Or had, but…May 13, 2020May 13, 2020