(ISO) 3494 NTERNATIONAL STANDARD Statistical interpretation of data -- Power of tests relating to means and variances Interpretation statistique des donnees -- Efficacite des tests portant sur des moyennes et des variances First edition -- 1976-12-01 ANsl Iniernat Doc Sect NOV 2 9 19/6 ISO 3494-1976 (E) UDC 519.28 Ref.No.ISO3494-1976 (E) Descript tatistics,data,mean,variance(statistics),tests,statisticaltests,efficiency,effectivness. Price based on 44pages FOREWORD Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso Member Bodies). The work of developing International Standards is carried out through Iso Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in tiaison with Iso, also take part in the work. Draft InternationalStandards adopted by theTechnical Committeesarecirculated to the Member Bodies for approval before their acceptance as International Standards by the Iso Council. drawn up by Technical Standard 1SO3494 was Committee International IsO/TC 69, Applications of statistical methods, and was circulated to the Member Bodies in March 1975 It has been approved by the Member Bodies of the following countries Australia Hungary South Africa, Rep of Austria India Switzerland Beigium Israel Turkey Brazil Mexico United Kingdom Bulgaria Netherlands U.S A Canada U S S.R. New Zealand Czechoslovakia Poland Yugoslavia France Portugal Germany Romania following expressed disapprovat of the The Member Bodies of the countries document on technical grounds : Japan Sweden @ International Organization for Standardization, 1976 : Printed in Switzerland CONTENTS Page SECTION ONE : COMPARISON TESTS General remarks 2 Historical note MEANS Reference to table Clause Comparison tests Variance(s) of ISO2854 Comparison of a mean with 3 a given value known A Comparisonofameanwith unknown A' a given value known c 6 Comparison of two means c' 8 Comparison of two means unknown VARIANCES Reference to table Clause Comparisontests of ISO2854 Comparison of a variance with a given 5 10 E value 11 G 6 Comparison oftwovariances SECTION TWO : SETS OF CURVES 12 References of the sets of curves 13 Sets ili