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In probability theory and statistics, the relative standard deviation (RSD or %RSD) is the absolute value of the coefficient of variation. It is often expressed as a percentage. A similar term that is sometimes used is the relative variance which is the square of the coefficient of variation. Also, the relative standard error is a measure of a statistical estimate's reliability obtained by dividing the standard error by the estimate; then multiplied by 100 to be expressed as a percentage.
- 100 × [(standard deviation of array X)/ (average of array X)] = relative standard deviation expressed as a percentage
- ↑ Dodge, Y. (2003) The Oxford Dictionary of statistical Terms, OUP. ISBN 0-19-920613-9
- ↑ http://www.chem.tamu.edu/class/fyp/mathrev/std-dev.pdf
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