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CONVENTIONAL ROUNDING

Statistics Directorate    
Definition:
A disclosure control method for tables of counts. When using conventional rounding, each count is rounded to the nearest multiple of a fixed base.

Context:
For example, using a base of 5, counts ending in 1 or 2 are rounded down and replaced by counts ending in 0 and counts ending in 3 or 4 are rounded up and replaced by counts ending in 5. Counts ending between 6 and 9 are treated similarly. Counts with a last digit of 0 or 5 are kept unchanged. When rounding to base 10, a count ending in 5 may always be rounded up, or it may be rounded up or down based on a rounding convention.

Source Publication:
Statistics Netherlands, Statistics Canada, Germany FSO, University of Manchester, 2005, Glossary of Statistical Disclosure Control, incorporated in paper presented at Joint UNECE/Eurostat work session on statistical data confidentiality, Geneva, 9-11 October 2005.

Statistical Theme: Methodological information (metadata)

Created on Wednesday, November 09, 2005