Interquartile Range and Values Wey Far Outside

Find IQR and usual limits for outliers using 1.5-IQR.

Your numbers

Range between first and third quartiles

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Fences na descriptive screening rules; them no prove say value get error.

Formula

Use IQR = Q₃−Q₁ with fences Q₁−1.5IQR and Q₃+1.5IQR. Q₁ and Q₃ na lower and upper quartiles with linear interpolation. Di tool flag values outside di fences; e no automatically mean say di values wrong.

Find IQR and usual limits for outliers using 1.5-IQR.

Example wey show the calculation

Values wey you observe: 1, 2, 3, 4, 5, 100

Range between first and third quartiles: 2.5
Lower limit for outliers: -1.5
Upper limit for outliers: 8.5
Observed values wey fall outside the limits: 1

Where e fit work and limits

Fences na descriptive screening rules; them no prove say value get error.

We check inputs for missing values and allowed ranges. Result wey pass the finite numeric range no go show. Rounding affect wetin display, while calculation use the model numeric precision.

Check your units and assumptions before you rely on result. Changing label no convert currency or physical unit.

Version of di formula: 4037db0272bd · Example don get check: 2026-10-30

Method