# Commission Implementing Decision of 10 September 2013 on the approval of the Daimler engine compartment encapsulation system as an innovative technology for reducing CO2 emissions from new passenger cars pursuant to Regulation (EC) No 443/2009 of the European Parliament and of the Council (Text with EEA relevance) (2013/451/EU), Division 4: CALCULATING THE VARIATION COEFFICIENTS OF THE ARITHMETIC MEANS

Extent: E+W+S+N.I.

The variation coefficients of the arithmetic means shall be calculated using the following formulae:
Formula 3: c v = s x - – ∕ x - –
cv variation coefficient;
s x - – standard deviation of arithmetic mean [g CO2/km];
x - – arithmetic mean [g CO2/km];
and
Formula 4: s x - – = ∑ i = 1 n x i − x - – 2 n n − 1
s x - – standard deviation of arithmetic mean [g CO2/km];
xi measurement value [g CO2/km];
x - – arithmetic mean [g CO2/km];
n number of measurements.

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Source: https://www.legislation.gov.uk/eudn/2013/451/annex/division/4 (the official version)
Page: https://openlegislation.uk/eu-decision-2013-451/annex/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.