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A procedure of studentizing or standardizing the residuals by dividing them by their estimated standard deviations is proposed for testing for outliers in simple linear regression. A simulation study yielded the critical values of the test statistic, and it is shown that these values are extremely close to the values in Grubbs' (1950) Table IA and independent of the values taken for the independent variable.  相似文献   

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B. Gunter 《技术计量学》2013,55(4):384-385
We introduce a very general “forward” method of data analysis that starts from a small, robustly chosen subset of the data and shows the effect of adding observations by a forward search. Powerful diagnostic procedures result: The observations are ordered by their agreement with the proposed transformation, masking is overcome, and the inferential effect of each observation is clear. We apply the resulting method to the transformation of both univariate and multivariate data. Other applications of the forward search are mentioned.  相似文献   

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张鹏 《标准科学》2012,(8):73-75
《国际通用计量学基本名词》第二版和第三版关于术语复现性的定义有较大的差异.文章对这种差异进行了比较和辨析,并得出第三版复现性的定义来源于《ISO 5725》的结论.在此基础上,对复现性定义的这种变化提出了自己的观点和看法.  相似文献   

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In studying the effects of many factors on several responses the experimenter is sometimes able to say which factors are likely to be influential for each response. This knowledge permits more efficient planning since certain effects and interactions are now negligible. Some 2 pq fractional replicates are constructed that take advantage of this knowledge  相似文献   

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