Learning Resources
Master statistical concepts with our free guides. Whether you're a student, teacher, or data analyst, find the right tutorial for your level.
Beginner Concepts
What are Quartiles?
The absolute basics of quartiles, percentiles, and how they divide data.
Mean vs Median vs Mode
Understand central tendency and when to use which metric for your data.
How to Read a Box Plot
Decode the anatomy of a box plot: whiskers, hinges, and outliers explained.
Practical Guides
Box Plots in Excel (2026)
Step-by-step guide to creating professional box plots in modern Excel versions.
Google Sheets Guide
How to make box plots in Google Sheets using the Candlestick chart hack.
IQR Outlier Detection
The definitive guide to the Interquartile Range method for finding outliers.
Find Outliers in Excel
Using conditional formatting and formulas to highlight outliers in your spreadsheets.
For Educators
Advanced Topics
Quartile Algorithms Explained
Deep dive into the 9 different ways to calculate quartiles (Tukey, M&M, etc.).
R vs Python for Stats
Comparing the statistical computing capabilities and default behaviors of R and Python.
MAD vs Tukey Method
Why Median Absolute Deviation is often better than IQR for robust outlier detection.
IQR vs Standard Deviation
When to use Z-Score (SD) and when to use IQR for finding outliers in your data.