摘要:

Sampling plans for truncated life tests from the normal and lognormal distributions are obtained. The tables of this paper give the minimum sample size necessary to assure a certain mean or median life when the experiment time is tied in advance. The modification necessary to assure any other quantile (percentile) of the distributions is obtained. Thus, sampling plans for establishing other percentiles of the distributions are shown to be obtainable from the tables of this paper. The operating characteristic functions of these plans are obtained and for a wide range of values of practical interest these functions are graphed in order to facilitate selection of an appropriate plan in a given situation. Producer's risk is discussed and a table is given for the ratio of the true median life to the specified median life (or the difference between the true mean lie and the specified mean life) to insure that the producer's risk does not exceed α = .l0, .05. An approximation is given for the minimum sample size. The use of tables and graphs is illustrated by examples.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490002

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

Some attribute sampling plans are presented based on the theory of runs in which a batch or process is accepted if a run of s successes is observed in a fixed number n of trials. The operating characteristic (OC) and expected number of trials (ENT) curves are given for the plans. Situations are described in which these plans are applicable and comparisons made with possible alternative plans.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490003

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

A class of designs are described for the case of three factors at levelsm,nandprespectively for which the total number of experiments required is a fraction ofmnp.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490004

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

The two stage group-screening procedure is extended to multiple stages for the case when responses are observed with negligible error. Because of their potential usefulness, three and four stage procedures are treated in some detail. The generaln+ 1 stage procedure is defined, a formula is developed for the expected number of runs, and for a fixed number of factors is minimized with respect to the sizes of the group-factors at various stages. Finally the procedures at different stages are compared with respect to the minimum expected number of runs.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490005

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

Recent work [10] has provided a method of constructing third order rotatable designs in three factors. This paper presents nine particular designs, given previously without explanation [11], together with background material, the formulae needed in order to analyze the results from such designs and a worked example.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490006

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

Tables of the (approximate) 1% and 5% critical values for the one and two sample empty cell tests are given, and illustrative examples are provided. A new derivation of the probability function of the number of empty cells for the two-sample case under the null hypothesis is presented.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490007

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

This paper is a sequel to two previous papers on the subject of the Folded Normal Distribution appearing inTechnometrics,S, pp. 543–550 and 551–562, (1961). In these earlier papers methods for estimating the parameters of the Folded Normal Distribution were proposed. Thii paper gives approximations for the standard errors for the maximum liklihood estimates of these parameters.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490008

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

摘要:

Various methods for improving the efficiency of statisticals imulation of complex systems are described and illustratedf or simple queuing situations. The paper proposes that the efficiency and effectiveness of statistical simulations can be increased throught he adaptation of experimentadl esign principles which exploit any qualitative knowledge surrounding the problem understudy. Some techniques explored are: proportional sampling fixed sequence sampling importance sampling and the use of concomitant information.

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490009

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490010

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1962.10490011

出版商:Taylor & Francis Group    

年代:1962

数据来源: Taylor