# 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 3.1.4: Calculation of the mean value x — and the estimated standard deviation s of the batch.

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

Calculate as follows:
the sum of the 35 actual capacity measurements x = Σxi
the mean value of the 35 measurements x — = Σx i 35
the sum of the squares of the 35 measurements Σxi 2
the square of the sum of the 35 measurements (Σxi)2, then Σx i 2 35
the corrected sum: SC = Σ x i 2 — 1 35 Σ x i 2
the estimated variance v = SC 34
Hence the estimated standard deviation: s = v

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Source: https://www.legislation.gov.uk/eudr/1975/107/annex/II/division/3/division/3.1/division/3.1.4 (the official version)
Page: https://openlegislation.uk/eu-directive-1975-107/annex-II/division-3/division-3.1/division-3.1.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.