# Commission Implementing Decision (EU) 2016/1721 of 26 September 2016 on the approval of the Toyota efficient exterior lighting using light emitting diodes for the use in non-externally chargeable hybrid electrified vehicles as an innovative technology for reducing CO2 emissions from passenger cars pursuant to Regulation (EC) No 443/2009 of the European Parliament and of the Council (Text with EEA relevance), Division: Formula 4

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

S P EI i – = S P EI i n = ∑ j = 1 n P EI i j − P EI i – 2 n n − 1 where:
n Number of measurements of the sample, which is at least 5
The CO2-emission correction coefficient k CO 2 shall be determined from a set of T measurements performed by the manufacturer, as defined in Regulation UN/ECE No 101, Annex 8. For each measurement, the electricity balance during the test and the measured CO2-emissions shall be recorded.
In order to evaluate the statistical error of k CO 2 , all T combinations without repetitions of T-1 measurements has to be used to extrapolate T different values of k CO 2 (i.e. k CO 2 t ). The extrapolation shall be performed according to the method defined in Regulation UN/ECE No 101, Annex 8.
The standard deviation of k CO 2 S k CO 2 – is thus calculated as defined by Formula 5.

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Source: https://www.legislation.gov.uk/eudn/2016/1721/annex/division/7/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2016-1721/annex/division-7/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.