# Council Directive of 19 December 1974 on the approximation of the laws of the Member States relating to bottles used as measuring containers (75/107/EEC), Division 3.2.4: Calculation of the mean value x — and of the average range of R — of the 40 measuring container bottles in the sample.

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

3.2.4.1. to obtain x — , calculate as follows:
the sum of the 40 actual capacity measurements xi: Σ xi
the mean value of these 40 measurements: x — = Σx i 40
3.2.4.2. To obtain R — :
Divide the sample, in chronological order of selection, into eight sub-samples of five measuring container bottles each.
Calculate as follows:
the range of each of the sub-samples, i.e. the difference between the actual capacity of the largest and the smallest of the five bottles in the sub-sample; eight ranges are thus obtained: R1; R2; ... R8
the sum of the ranges of the eight sub-samples:
Σ Ri = R1 + R — 2 + ... + R8
The average range R — is therefore: R — = ΣR i 8

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Source: https://www.legislation.gov.uk/eudr/1975/107/annex/II/division/3/division/3.2/division/3.2.4 (the official version)
Page: https://openlegislation.uk/eu-directive-1975-107/annex-II/division-3/division-3.2/division-3.2.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.