翻訳と辞書 Words near each other ・ Robur (company) ・ Robur (truck) ・ Robur Carolinum ・ Robur the Conqueror ・ Roburent ・ Roburin A ・ Roburnella wilsoni ・ Roburnia ・ Robursport Volley Pesaro ・ Robust associations of massive baryonic objects ・ Robust Bayesian analysis ・ Robust capuchin monkey ・ Robust cardinalfish ・ Robust climbing salamander ・ Robust collaborative filtering ・ Robust confidence intervals ・ Robust control ・ Robust cottontail ・ Robust decision ・ Robust decision-making ・ Robust Details Limited ・ Robust frog ・ Robust ghost pipefish ・ Robust golden mole ・ Robust Header Compression ・ Robust measures of scale ・ Robust optimization ・ Robust parameter design ・ Robust pipehorse ・ Robust principal component analysis Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Robust confidence intervals ： ウィキペディア英語版 Robust confidence intervals In statistics a robust confidence interval is a robust modification of confidence intervals, meaning that one modifies the non-robust calculations of the confidence interval so that they are not badly affected by outlying or aberrant observations in a data-set. == Example == In the process of weighing 1000 objects, under practical conditions, it is easy to believe that the operator might make a mistake in procedure and so report an incorrect mass (thereby making one type of systematic error). Suppose he has 100 objects and he weighed them all, one at a time, and repeated the whole process ten times. Then he can calculate a sample standard deviation for each object, and look for outliers. Any object with an unusually large standard deviation probably has an outlier in its data. These can be removed by various non-parametric techniques. If he repeated the process only three times, he would simply take the median of the three measurements and use σ to give a confidence interval. The 200 extra weighings served only to detect and correct for operator error and did nothing to improve the confidence interval. With more repetitions, he could use a truncated mean, discarding say the largest and smallest values and averaging the rest. He could then use a bootstrap calculation to determine a confidence interval narrower than that calculated from σ, and so obtain some benefit from a large amount of extra work. These procedures are robust against procedural errors which are not modeled by the assumption that the balance has a fixed known standard deviation σ. In practical applications where the occasional operator error can occur, or the balance can malfunction, the assumptions behind simple statistical calculations cannot be taken for granted. Before trusting the results of 100 objects weighed just three times each to have confidence intervals calculated from σ, it is necessary to test for and remove a reasonable number of outliers (testing the assumption that the operator is careful and correcting for the fact that he is not perfect), and to test the assumption that the data really have a normal distribution with standard deviation σ. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Robust confidence intervals」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.