ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00050.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00051.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

摘要:

SummaryAn exposition is given of the methods of statistical quality control as applied to the results of measurements on a continuous scale. Examples are given of the information which may be obtained about production processes by using control charts for the mean and range of small samples taken with regular intervals out of a flow of products from a particular machine.

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00052.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

摘要:

SummaryBefore the war the Institute of Praeventive Medicine issued an inquiry about the personal use of narcotics by physicians, part of it regarding the influence of the character. The scheme of Heymans and Wiersma being considered most apt to render characterising numbers, questions were included to diagnose whether “activity”, “emotionality” and/or “secondary function” are present. Statistical analysis of the returns from 1593 physicians, shows that emotionality highly enlarges the use of narcotics (not only by the fact that it is combined with more disturbances in sleep). Activity showed no influence, whereas it is possible that secondary function stimulates the use in a small degree. The different types of character act by their different amount of these three qua

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00053.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

摘要:

SummaryAn investigation is made about the probabilities of loss and delay in automatic telephone traffic, using the method of the statistical equilibrium.The validity of several formulae found by Erlang, is discussed in connection with the fundamental formula of Poisson.

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00054.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

摘要:

SummaryOn behalf of the long term weatherforecast a great number of correlations between the weatherconditions elsewhere and those in our country have to be calculated and considered.In this paper the Kon. Ned. Meteorologisch Instituut at De Bilt presents a method to find the best applicable meteorological elements to determine our weatherconditions in future. For the calculation of the best multiple coefficients of correlation, the partial coefficients of correlation are arranged in a so called correlationtriangle.

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00055.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

摘要:

SummaryIf we want to check a hypothesis by numbers, obtained from measuring or from counting in a random sample, practically always a difference will be found between these numbers and those, derived from that hypothesis‐Such a difference may be caused by faults in the hypothesis or by factors which we do not want to analyse such as faults in the measuring or the influence of the sampling or influences acting together with the one regarded in our hypothesis.The theory of statistics shows a way to estimate the chance that such another cause would result into a difference equal to or large than the one actually found. If in a given case this “chance of surpassing” is found to be small, we have to reject the hypothesis concerned. The smaller this chance is the larger is the likelihood of that rejection; it is the estimate of the likelihood of each statistical concl

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00056.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00057.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1946.tb00058.x

出版商:Blackwell Publishing Ltd    

年代:1946

数据来源: WILEY