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Preparing Your Data

Data type

Select one or more columns of continuous data. Each column is analyzed independently. A Group By column can be used to split the analysis by category.

Data requirements

• At least three finite data values are required. The normal probability plot and its Anderson-Darling statistic need at least three points.
• The values must not all be identical. Zero spread leaves nothing to estimate, so a sample with no variation is reported as an error rather than a zero-width interval.
• Missing values and non-numeric entries are ignored. All calculations use only the finite values actually measured.