Free Trimmed Mean Calculator
Compute a trimmed mean by removing extreme values before averaging to reduce outlier influence.
Trimmed Mean (drop highest & lowest)
12.0000
Trimmed Mean (drop highest & lowest) vs Smallest Value
How the Trimmed Mean Works
Approach
1. Sort the values from smallest to largest 2. Remove a fixed percentage from each end (here, one value from each end) 3. Average the remaining values
Trimmed Mean = Sum of remaining values / Count of remaining values
This technique protects the average from outliers while still using most of the data. A common choice is a 20% trimmed mean, which removes the top and bottom 20% of observations.
Example Calculation
Data: 2, 10, 12, 14, 98. Compute the trimmed mean removing one value from each end.
- 01Sorted values: 2, 10, 12, 14, 98
- 02Remove lowest (2) and highest (98)
- 03Remaining: 10, 12, 14
- 04Trimmed Mean = (10 + 12 + 14) / 3 = 12
- 05Compare: Regular Mean = 136 / 5 = 27.2 (heavily influenced by 98)
Frequently Asked Questions
Learn More
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