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    General & Math

    Four-Value Standard Deviation Calculator

    Find sample and population standard deviation of four numeric observations. Sample deviation divides by n−1; population deviation divides by n. This browser-local calculator updates from numeric inputs and shows a labelled breakdown without uploading your data.

    MAKE IT SIMPLE
    Calculation assumptions

    Sample deviation divides by n−1; population deviation divides by n.

    Result

    Worked examples

    Observation 1 10 · Observation 2 12 · Observation 3 14 · Observation 4 16

    First calculated quantity: 13.0000

    Find sample and population standard deviation of four numeric observations. Sample deviation divides by n−1; population deviation divides by n.

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