Data Science Tutorials
Data Science provides a comprehensive curriculum for aspiring data scientists and analysts. Our tutorials cover statistical analysis, machine learning, and data visualization, suitable for both beginners and intermediate learners. Through interactive labs and hands - on coding exercises, you'll gain practical experience with real - world datasets. Our data science playground allows you to apply your skills in a dynamic online environment.
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See What Random Assignment Can Change
Keep one outcome per visitor and both group sizes fixed while exploring real reproducible reassignments and plotting their observed differences.
Python
Report the Evidence Without Choosing a Winner by Habit
Enumerate the fixed signup experiment's allocation distribution, calculate a defined exact two-sided p value and report evidence without assuming a winner.
Python
Define One Outcome per Assigned Visitor
Build one binary signup outcome per assigned visitor, preserve people without events and compare seven-day signup rates by stable identity.
Python
Read a Photo Catalog Through HTTP
Request a real local HTTP photo API and export a filtered page sample as CSV.
Python
Follow Every Catalog Page
Follow every opaque catalog cursor and publish complete CSV exports safely.
Python
Define What Is Known Before the Event
Build a median attendance baseline, separate earlier training workshops from later evaluation events and learn missing-value means only from training rows.
Python
Compare a Small Model with the Baseline
Fit a short leakage-aware regression Pipeline, compare continuous holdout errors with an early-median baseline and deliver truthful plots and unlabeled future forecasts.
Python
Turn Mistakes into a Practice Round
Save stable quiz answers and independently practice only this round's mistakes.
Python
Keep Answers Correct When Choices Move
Build quiz rules that keep answer identities correct when random choices move.
PythonLinux
Make One Template Work for Every Guest
Generate complete HTML invitation batches from CSV guests, JSON events and a prepared template while preserving special characters and earlier work.
Python
Keep Every Order Across Pages
Add complete timestamp-and-ID cursors to MySQL order queries for correct ascending and descending pagination.
MySQL
Protect Workshop Registration Rules
Keep a working MySQL registration desk consistent without confusing same-name people or losing existing bookings.
MySQL
End Database Access When the Report Is Finished
Finish a real database report, revoke its exact lease, observe natural expiry on a separate short lease, and recover with a new temporary login.
PostgreSQLShellCybersecurity
Make the Dependency Install Reject Changed Wheels
Constrain complete wheel bytes with approved hashes while preserving correct builds and legitimate mirrors.
CybersecurityPythonShell
Close Each Venue’s Local Sales Day
Build time-zone-independent PostgreSQL closing queries and real ticket reports using each venue’s local calendar-day boundaries.
PostgreSQL
Give the Settlement Report Only the Data It Needs
Give a real settlement report a dynamically issued PostgreSQL login that can read its reporting view while private tables and writes remain unavailable.
PostgreSQLShellCybersecurity
Choose the Package the Ticket Tool Needs
Choose approved pip dependencies and rebuild a ticket tool that preserves correct family and member prices.
PythonShellCybersecurity
Count Logical Votes Rather Than Records
Count Kafka vote identities, reject conflicting retries, and publish a real booth snapshot without changing the source.
Big DataPythonLinux
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