Bell curve · Zero variance

Retain the mean and count without inventing a fitted curve.

Use the normal curve as a model of the sample distribution. Its points are derived density samples, not original observations or frequencies. A fitted curve does not prove normality.

Up to 10,000 finite samples. Mean and sample standard deviation use the original source and the n−1 denominator. Fewer than two samples or zero variance retains the actual summary and draws no fitted curve.

intervals is an integer 16–256, default 64; standardDeviations is 1–6, default 3. Individual detail reads derived X/density. Axes, colours, labels and legend are available; no shared tooltip, viewport, references, markers, point overrides or stacking.

• Normal density
• More deviations
• Zero variance

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