Organisation of Data

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Raw data are data in their original, unorganised form. They are not yet arranged into a clear order, so they are difficult to study directly.

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Classification divides a large mass of data into groups according to common characteristics. It eliminates unnecessary details, simplifies complex data, and makes comparison and statistical treatment …

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Classification is grouping of data according to their identity, similarity, or resemblances. It arranges data into different classes based on characteristics.

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L.R. Connar. The quoted definition describes classification as arranging things into groups according to their resemblances or affinities.

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Classification of data is of four types: geographical classification, chronological classification, qualitative classification, and quantitative classification.

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Geographical classification is based on place or location. Data are grouped area-wise, such as by states or districts.

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Chronological classification is based on time. Data are arranged year-wise, period-wise, or by any time sequence.

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Qualitative classification groups data according to attributes or qualities such as sex, literacy, residence, or religion. It is further divided into simple classification and manifold classification.