Interquartile range
Interquartile range: use observations. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
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Formula & explanation
IQR = Q₃−Q₁, using inclusive linear-interpolation quartiles.
Variables & units
- Observations
- comma separated
Worked example
1,2,3,4,5 has Q1=2, Q3=4, and IQR=2.
Assumptions
Quartile conventions vary; the convention is stated explicitly.
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.
Practice with an example
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