Need to flag outliers or data entry mistakes in your spreadsheet? Learn how to detect them scientifically using Excel stats functions and conditional formatting! 📊
In this pro tip, Chris Dutton shows you how to use quartiles, interquartile range (IQR), and custom highlight rules to uncover statistical outliers—no add-ins or complex tools required.
✨ What you’ll learn:
How to calculate Q1, Q3, IQR, and outlier fences
Set dynamic conditional formats to flag out-of-range values
Clean up your data and catch input errors like a pro
⏱️ Timestamps:
00:00 – Intro to Outlier Detection
00:30 – Quartiles, Median & IQR Explained
01:30 – Defining Outlier “Fences”
02:30 – Applying Conditional Formatting Rules
04:00 – Adjusting Sensitivity with Fence Multiplier
05:30 – Practical Use Cases (e.g. Data Entry Mistakes)
07:00 – Recap & Wrap-Up
🔗 Resources & Related Links
Want to dive deeper into data cleaning and analytics? Check out the full Excel Pro Tips course for more expert-level tricks:
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