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Data
Integrity – the correctness of the information stored in the
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database,
and selection has to be made based on the clean data
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Current
Status of Database Quality –
a large-scale numeric
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database
without critical evaluation may have an error rate of 2-5%.
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Major
Error Types –
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Typographical errors
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Unit-conversion errors
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Report interpretation errors
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Metadata compilation errors
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Original report errors
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Systematic
and iterative approach
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