摘要:

SummaryNote on the fitting of a function to a large number of observations.The paper deals with various ways in which a set of functions may be chosen to describe a given body of observations, the parameters determining the function being determined by the data.The special case when the functions of the set are given in the form of a table or a graph is emphasized.

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00436.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

SummaryA test for comparing two small unknown probabilities, using samples of equal size, and its power.For testing the difference between two small proportions a slightly revised form of the sign test is used, giving a better approximation of the significance level α and a larger power.A table of critical values of the test and graphs of its powerfunction are given

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00437.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

SummaryThe theoretical aspect of least squares.This article contains a slightly modified presentation of the Markoff theory of least squares as developed along different lines by Aitken and by David and Neyman. The modifications aim at a more complete treatment and a geometrical illustration of the connection between best linear estimates and generalized least squares. The unbiasedness of ordinary least squares estimates in the case of heteroscedastic and correlated errors is stressed and the loss of efficiency is shown to be generally small. Topics like orthogonalization, partial correlation and what is called “over‐correlation” are treated in passing.Matrices are constantly used, being the adequate tools in this matter. In the appendix a special relevant matrix theorem is derived, viz. a generalization of the well known Cauchy inequ

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00438.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

SummaryThe clearance between bearing and bore depends more or less on the form (out of round) of the bore.Consequently, if high accuracy is required and a positive clearance must be sure, the information got from measuring a turned bore must contain a clear indication about the value of its minimum diameter.A statistical solution is given to find the distribution of the minimum diameter, if known:a. the smallest allowable clearance,b. the distribution of the outside diameter of the bearing,c. the standard deviation of the minimum diameter of the bore.Moreover the measuring method at the lathe was revised and a control chart for the median was intro

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00439.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY

摘要:

Book reviewed in this article:Methods of statistical analysis, by C. H. GouldenDe organisatic van de vcrkoop door L. MeertensStatistics for technologists, by C. G. Paradine and B. H. P. Rivett

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1954.tb00440.x

出版商:Blackwell Publishing Ltd    

年代:1954

数据来源: WILEY