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101.
102.
This paper considers five test statistics for comparing the recovery of a rapid growth‐based enumeration test with respect to the compendial microbiological method using a specific nonserial dilution experiment. The finite sample distributions of these test statistics are unknown, because they are functions of correlated count data. A simulation study is conducted to investigate the type I and type II error rates. For a balanced experimental design, the likelihood ratio test and the main effects analysis of variance (ANOVA) test for microbiological methods demonstrated nominal values for the type I error rate and provided the highest power compared with a test on weighted averages and two other ANOVA tests. The likelihood ratio test is preferred because it can also be used for unbalanced designs. It is demonstrated that an increase in power can only be achieved by an increase in the spiked number of organisms used in the experiment. The power is surprisingly not affected by the number of dilutions or the number of test samples. A real case study is provided to illustrate the theory. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
103.
This paper finds the mathematical forms of the distribution of the product where x and x follow a bivariate normal distribution In this paper the distribution when PT0 is expressed as an integral, a new, fundamental result. From this general form, six different cases can be distinguished depending on what is known about the parameters and p. The special cases are Aroian $year:1959 and (6) Additionally, we prove that if and as the distribution of the product approaches the Type III distribution. When p=0# Aroian $year:1959 and Aroian and Meeker $year:1977, give tables for various values of 6., 6 . The results in this paper will be used to provide brief tables for p^O in a separate paper 相似文献
104.
John E. Angus 《统计学通讯:理论与方法》2013,42(12):4413-4419
Arnold and Strauss (1988) derived a family of bivariate life distributions having the property that the conditional distributions are exponential. Asymptotic distributions for the marginal and bivariate extremes for this family of distributions are derived employing the asymptotic theory of extreme order statistics. 相似文献
105.
Alberto Luceño 《统计学通讯:模拟与计算》2013,42(1):235-245
A well-know process capability index is slightly modified in this article to provide a new measure of process capability which takes account of the process location and variability, and for which point estimator and confidence intervals do exist that are insensitive to departures from the assumption of normal variability. Two examples of applications based on real data are presented. 相似文献
106.
Na You 《统计学通讯:理论与方法》2013,42(1):33-41
ABSTRACT Population size estimator is derived for a proportional trapping-removal model with a known ratio between two sub-population sizes, and the corresponding asymptotic properties is obtained. The performance of the proposed estimator is checked via simulation studies and an example. 相似文献
107.
苏全有 《华北水利水电学院学报(社会科学版)》2011,(6):17-21
李敏修堪称民国时期中原地区绅士群体中的标志性人物,河南地区的最后一位理学家。他的社会思想主要包括忧患意识、济民思想、教化三个方面。其中,忧患意识具体体现为不满时政;济民思想可分为两个层面,一是民间私助,二是从政助民;至于教化内涵有三:尚俭、耕读传家、崇古,之所以如此,与其理学思想有关。总而论之,李敏修的社会思想介乎于激越与落伍之间,具有过渡性及一定的包容性,其中所蕴涵的精髓,如崇尚优秀传统文化等,对当今社会进化具有相当指导意义。 相似文献
108.
康健 《北京市财贸管理干部学院学报》2011,(4):20-23
分析了首都粮食流通体系的现状及问题,提出了建设首都粮食流通聚集区的设想,开展了必要性分析、立地与规模需求分析,提出了建设思路、运作模式和运营重点。 相似文献
109.
110.
Marco Catarci 《Intercultural Education》2013,24(5):456-475
The present article focuses on quantitative research carried out on a statistically representative sample of Italian primary schools with a high concentration of immigrant students. Research data show that schools with a higher number of immigrant students offer a greater number and a wider variety of intercultural initiatives. The presence of immigrant students serves as an effective stimulus in enhancing intercultural approaches. Furthermore, the opinions of head teachers about the proposal of ‘separate classes’ for immigrant students and the proposed ‘limit of 30% on the presence’ of immigrant students are negative. These judgements do not change in a statistically significant manner in relation to concentration of immigrant students: in particular, higher rates of immigrant students are not related to more positive opinions. Continuing education on intercultural issues is widely adopted, mainly on behalf of teachers and less often on behalf of head teachers and other school personnel. Finally, activities by ‘linguistic facilitators’ and ‘linguistic and cultural mediators’ are not significantly related to a decrease in perceived concern regarding problematic situations. 相似文献