“Olga is a brilliant data analyst who dives right into challenges and can explain her solutions clearly to those not deep in her skill set. ”
San Francisco, California, United States
Contact Info
10K followers
500+ connections
About
Activity
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One thing I love about analytics: it's cross-disciplinary! If you work as a Data Analyst, it's likely that you'll end up needing to exercise many…
One thing I love about analytics: it's cross-disciplinary! If you work as a Data Analyst, it's likely that you'll end up needing to exercise many…
Liked by Olga Berezovsky
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Commercial Experiments vs. Mad Science A commercial experiment attempts to create or improve something that people need, want, and are ready to buy.…
Commercial Experiments vs. Mad Science A commercial experiment attempts to create or improve something that people need, want, and are ready to buy.…
Liked by Olga Berezovsky
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It's Friday, and I'm feeling grateful for incredible minds whose work inspires and educates. Here are some favourites I recommend following on…
It's Friday, and I'm feeling grateful for incredible minds whose work inspires and educates. Here are some favourites I recommend following on…
Liked by Olga Berezovsky
Experience & Education
Licenses & Certifications
Volunteer Experience
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Developer
PyLadies
- Present 8 years 3 months
Science and Technology
We are an international mentorship group with a focus on helping more women become active participants and leaders in the Python open-source community. Our mission is to promote, educate and advance a diverse Python community through outreach, education, conferences, events and social gatherings.
PyLadies also aims to provide a friendly support network for women and a bridge to the larger Python world. Anyone with an interest in Python is encouraged to participate! -
Volunteer
Women Who Code
- Present 5 years
Science and Technology
Our mission is to inspire women to excel in technology careers.
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Consultant
Women in Analytics (WIA)
- Present 4 years
Science and Technology
Our mission is to increase visibility to the women making an impact in the analytics space and provide a platform for women to lead the conversations around the advancements of analytical research, development, and applications.
WIA aims to be an extremely inclusive organization and we welcome anyone to join the community!
Publications
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Supervised machine learning - Binary logistic regression overview
https://www.logic2020.com/insight/tactical
Predictive modeling (or machine learning) can be challenging to understand and use because there is no one algorithm that would work the best for every problem. In this article, I go over some use cases for logistic regression and walk through the steps of applying this classification algorithm for data forecasting.
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Exploratory data analysis using Python Pandas and SQL
https://www.logic2020.com/insight/tactical
Pandas Python library is becoming more and more popular between data scientists and analysts. It allows you quickly to load, process, transform, analyze, and visualize the data. In this article, I use some common commands for exploratory data analysis using Pandas and SQL for a public sample of random Reddit posts.
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Getting started with SQLite – Pros, cons, and tips
https://www.logic2020.com/insight/
SQLite is a favorite, go-to SQL language when you have limited time and a lot of data to go through. We're sharing some useful tips and tricks for using SQLite because while the language has big advantages, it also has some limitations.
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User Segmentation and Power User Analysis in SQL
https://blog.olgaberezovsky.com/@olgaberezovsky
Quantitative user profiling is one approach to segmenting and defining user categories based on the data you collect. It helps to divide your user base into cohorts based on user activity level and your top marketing/product metrics: MAU/DAU (monthly/daily active users), user engagement, retention.
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POSTGRESQL: HOW TO JOIN UNRELATED TABLES
Primitive Logic Insights
More and more companies are using PostgreSQL, one of the world's most popular relational database management systems (RDBMs). Personally, I am a big fan for two reasons. PostgreSQL allows you to easily distribute queries across multiple nodes running in parallel and to create custom procedures, and it also supports advanced SQL and numerous window functions, aggregates, table samplings, and other cost-based query optimizations.
This post will focus on PostgreSQL joins and show you a way to…More and more companies are using PostgreSQL, one of the world's most popular relational database management systems (RDBMs). Personally, I am a big fan for two reasons. PostgreSQL allows you to easily distribute queries across multiple nodes running in parallel and to create custom procedures, and it also supports advanced SQL and numerous window functions, aggregates, table samplings, and other cost-based query optimizations.
This post will focus on PostgreSQL joins and show you a way to connect two tables that are not related by a foreign key relationship. -
Data sampling in PostgreSQL
https://blog.olgaberezovsky.com/@olgaberezovsky
Working with big data you often have to apply different sampling techniques for your analysis — select a representative subset of data to identify patterns and trends in the larger data set. While there are many sampling techniques, in the article I am describing one of the simplest ways to get a randomly distributed data set from RedShift using PostgreSQL.
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Forecasting modeling in R
https://blog.olgaberezovsky.com/
Building predictions and model forecasts is one of the most common challenges in data analytics. Below I am going to simulate a time series analysis and projection based on the chronological raw data.
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User Surveys
Change.org
We use online surveys on our website to learn our users and their goals, identify areas for improvement, and measure user satisfaction.
Projects
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Data Analysis Journal
- Present
Behind the scenes of data analysis. Practical examples, interview questions, events, and news for busy analysts.
Languages
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English
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Ukrainian
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Recommendations received
9 people have recommended Olga
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𝗢𝗻 𝗙𝗿𝗶𝗱𝗮𝘆𝘀 𝗜 𝘀𝗵𝗮𝗿𝗲 Here's #TheDataDissemination, a weekly round up of the content that's provided value to me. It's Edition 28 -…
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A mantra that will not let you down: Hire for attitude, teach the skills. If you reflect on decisions gone wrong, super senior leaders or new…
A mantra that will not let you down: Hire for attitude, teach the skills. If you reflect on decisions gone wrong, super senior leaders or new…
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I’m excited to announce that my team finished another consulting project involving OCR and OpenAI’s Vision API! 🎉 Our client heard about ChatGPT’s…
I’m excited to announce that my team finished another consulting project involving OCR and OpenAI’s Vision API! 🎉 Our client heard about ChatGPT’s…
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"Cerulean" is a color - "a blue color that can range from a light azure to a more intense sky blue, and can also have green undertones." But in my…
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Here's what Olga Berezovsky, author of Data Analysis Journal, says about measuring the most important but misunderstood growth metric. I'm talking…
Here's what Olga Berezovsky, author of Data Analysis Journal, says about measuring the most important but misunderstood growth metric. I'm talking…
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You don't need IT, until you really, really, need IT. Many organizations are cutting platform and ops resources - and you can get away with that for…
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Another interesting insight about engagement signals and LTV prediction from one of research papers. 👉 "Event-related features (first 7 days)…
Another interesting insight about engagement signals and LTV prediction from one of research papers. 👉 "Event-related features (first 7 days)…
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