摘要:

SummaryThe paper gives a survey of several types of datapaper.,The designs mentioned are:aequidistant paper (chapter 3)ratiopaper (chapter 4)logarithmic paper (chapter 5)time or calendar paper (chapter 6)triangular coordinate paper (chapter 7)polar coordinate paper (chapter 8)normal probability paper (chapter 9)Special attention is given tobinomial probability paper (chapter 10)In each chapter are treated:1) the definition of the design2) the function represented by a straight line3) the most commonly used divisions4) the registration numbers of the collection of the Central Bureau of Statistics in the Netherlands5) the use of the paperAll items mentioned are present in the collection of the Central Bureau of Statistics in the Ne

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00446.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

SummaryWhile making a series of 10,000 “function” ‐punched cards with the data of the well‐known Barlow's tables and with the logarithms of the integers from the tables of Schrön, we took the opportunity to examine the accuracy with which our personnel and machines are working under normal conditions. We examined for instance in how many cases the first punching operator did not notice an error she made and how many of those errors remained after control‐punching. These last‐mentioned errors were traced by control‐calculations with the punched cards, e.g. by calculating and checking n × n2=n3or by the calculation of differences. In this way it appeared that the first punching operator did not notice 270 errors in the part coming from Barlow's tables, being 0.055% of the number of punched columns or 2,7% of the number of cards. Further it was found, that only one error of the first operator was not noticed (or not corrected) by the controling operator.Besides this a number of printing‐errors, or anyway errors which were the result of the bad legibility of the digits, were found in Barlow's tables, where the punching operator and the controling operator had come to the same interpretation.The article gives in some detail what precautions were taken by wiring the machines to attain that an error would b

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00447.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

SamenvattingDit artikel bevat een elementaire behandeling van afrondingseffecten in steekproeven.Zoals men verwacht, neemt de variantie van het steekproefgermddelde door af ronding der waarnemingen toe met een factor 1 +b2/12σx2,waarbij b het afrondings‐ interval enσx2de stamvariantie is, in analogie met de bekende correcties van Sheppard. Verder wordt het effect van afronding op de variantie van de steek‐proefvariantie onderzocht. Er wordt op gewezen, dat de afrondingsfout ε in één steekproef gecorreleerd is met de afwijking van de nauwkeurige — d.w.z. niet afgeronde — stochastische variabelexvan zijn gemiddelde μ, hoewel deze correlatie gemiddeld nul is. Het gevolg is, dat de variantie van de steekproefvariantie toeneemt. Bij “gewone” waarschijnlijkheidsverdelingen, die continue naar nul gaan bij x →, is deze toename gelijk aan1/n(1/3b2σx2+ 1/180b4)waarbij n de grootte van de steekproef is. Bij normale verdelingen is het effect ongeveer twee maal zo groot als de toename volgens de Sheppard's correctie van de

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00448.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00449.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

SummaryIn designing field experiments in plant breeding and in interpreting the results of these experiments, the following two problems are important:a. to find a suitable criterion for the selection,b. determination of the number of replications needed for a given probability of error.A solution is given for the first problem, in the case that a large number of new varieties are compared with a standard variety with many replications. The solution given minimizes the chance of a wrong selection i.e. the chance of retaining an inferior or rejecting a superior variety. The second problem is discussed in connection with the chance of discarding a good variety when the above mentioned criterion is u

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00450.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

Book reviewed in this article:Introduction to Mathematical Statistics, Paul G. HoelStatistical Theory with Engineering Applications en hierbij aansluitend Statistical Tables and Formulas, A. HaldDesign for Decison, Irwin D. J. BrossDe wetenschap van het toeval, H. E. Levinson, vertaling van J. J. A. Mooy, W. P. van Stockum&ZoonStatistiek. Deel I, De statistische methode, O. Bakker. J. Muusses

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00451.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY