Outlier fences
Outlier fences: use observations. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Lower = Q₁−1.5 IQR; upper = Q₃+1.5 IQR
Variables & units
- Observations
- comma separated
Worked example
1,2,3,4,100 flags 100 using 1.5×IQR fences.
Assumptions
A screening convention, not a rule to automatically remove observations.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
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