摘要:

A discussion of the effect of grouping defects by classes while using MIL-STD-105D is presented both in terms of acceptance probabilities and cost. Proposalsaremade for establishing more realistic AQL values dependent on the number of defects being grouped.

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980436

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

Fitting polynomials to mixture data by linear least squares often leads to inaccurate computer solutions when there are restraints on composition. When the restricted region in composition contains enough properly distributed points, accuracy can be achieved by suitable transformations which improve conditioning of the normal equations. Two transformations are discussed which use the Scheffépolynomial forms for mixtures and are easy to apply to data from undesigned experiments. An application of both transformations to data from an extreme vertices design illustrates the improvement in conditioning.

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980437

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

The first part of this article, which was published in the July 1970 issue of the Journal of Quality Technology, described different types of confidence intervals, tolerance intervals, and prediction intervals; provided factors for constructing such intervals for a normal population; illustrated the calculation of the intervals; and compared their applications. This second, and final, part of the article indicates how the tabulated factors were obtained, examines the effect on the length of the intervals of increasing the sample size, reviews the importance of the normality assumption, briefly describes various additional intervals for a normal population, and provides information about a time-sharing computer program for obtaining statistical intervals. The mathematical basis for two of the intervals is given in two appendices, and a third appendix describes the construction of a confidence interval on a percentile of a normal distribution.

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980438

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

The Wilcoxon two-sample test carried out in randomized blocks is discussed and exemplified. Tables of critical values are given for 1-sided (2-sided) significance levels of 0.001 (0.002), 0.005 (0.01), 0.01 (0.02), 0.025 (0.05), 0.05 (0.10), and 0.10 (0.20) for 1 to 30 equal replicates of each of the two treatments in 1 to 12 blocks. The normal and other approximations are assessed. A short computer program is given which will approximate the probability associated with a grand rank sum for unequal as well as equal replicates in any number of blocks.

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980439

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

A trial-and-error procedure, using widely available tables, is presented for finding double sampling plans based on the binomial, hypergeometric, and Poisson distributions.

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980440

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

In statistical tolerancing the tolerances on component parts of an assembly are specified as distributions. Allowance should be made for the fact that a distribution for a component may shift due to raw material variations, different suppliers, tool wear, and a myriad of other causes. We consider this problem for the simple case of a linear system with normal distributions which have known and fixed variances for the component tolerances; the component means are allowed to shift. We assume that the lots of incoming components are subjected to acceptance sampling by variables inspection and it is the purpose of this paper to relate the component tolerances and the sample sizes and levels of significance of the tests. An asymptotic expansion for the probability that an assembly will be out of specifications, which is derived elsewhere, and which rests on the pessimistic assumption that all possible component means for incoming lots are equally likely is explained and its use illustrated by example.

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980441

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980442

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980443

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980444

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0022-4065    

DOI:10.1080/00224065.1970.11980445

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor