Data Science Educational Resources
StrataScratch is a data science educational platform with over 1,000+ real interview questions from your favorite companies.
Guides
A Beginner’s Guide to Collinearity: What it is and How it affects our regression model
What is Collinearity? How does it affect our model? How can we handle it?
Nathan Rosidi -
Basic Types of Statistical Tests in Data Science
Navigating the World of Statistical Tests: A Beginner’s Comprehensive Guide to the Most Popular Types of Statistical Tests in Data ScienceNathan Rosidi -
How to Join 3 or More Tables in SQL
Here we’re going to talk about using a commonly required SQL concept - how to join 3 or more tables in SQL.Nathan Rosidi -
An Introduction to the SQL Rank Functions
This introduction covers two of the most common SQL Rank Functions, their differences, and how to use them.Nathan Rosidi -
The Ultimate Guide to SQL Aggregate Functions
Aggregate Functions in SQL is the main tool for data aggregation and one of the most common topics when working with data.Nathan Rosidi -
Introduction to IFNULL() Function in SQL
Learn all about the SQL IFNULL() function in MySQL and PostgreSQL with the example of a hard-level Interview Question asked by Google.Nathan Rosidi -
LeetCode Python Solutions for Data Science
How does a data scientist use LeetCode to practice their python skills for their data science interviews?Nathan Rosidi -
19 Data Science Project Ideas for Beginners
Data science projects are crucial for job finding. They let you learn and show that you can do the actual work in practice, not just blabber about it.
Tihomir Babic -
4 Python Data Visualization Libraries You Can’t Do Without
Matplotlib, seaborn, Plotly, and pandas - the 4 Python data visualization libraries you can’t do without. Learn how to use them with our code examples.Nathan Rosidi -
Data Mining Projects: With Source Codes
Unlock the Full Potential of Data with Expert-Guided Data Mining Projects and Source Code.Nathan Rosidi -
Methods for Ranking in Pandas
Learn how to rank data in Python Pandas using different methods. We use the Airbnb, Google, and Yelp datasets for practical examples.Nathan Rosidi -
Probability Cheat Sheet: Rules, Laws, Concepts, and Examples
This probability cheat sheet equips you with knowledge about the concept you can’t live without in the statistics world. Yes, it’s probability!Nathan Rosidi -