chemical thermodynamics of neptunium and plutonium - U.S. ...

C.2 Two or more independent source data 827Example C.2:The following credible source data are given:X 1 = (4.5 ± 0.3)X 2 = (5.9 ± 0.5)The uncertainties have been assigned by the reviewer. Both experimental methods aresatisfactory, and there is no justification to discard one of the data. The selected valueis then:X = (5.2 ± 1.2)Case II. Outliers: This problem can often be solved by either discarding the outlyingFigure C.1: Illustration for Example C.2XÙX 1ÙX 2Ù¹4 4.5 5 5.5 6 6.5Xdata point, or by providing it with a large uncertainty to lower its weight. If, however,the outlying value is considered to be of high quality and there is no reason to discardall the other data, this case is treated in a way similar to Case I. Example C.3 illustratesthe procedure.Example C.3:The following data points are available. The reviewer has assigned the uncertaintiesand sees no justification for any change.i X i σ i1 4.45 0.352 5.9 0.53 5.7 0.44 6.0 0.65 5.2 0.4There are two sets of data that, statistically, belong to different parent distributions Aand B. According to Eqs. (C.3)and(C.4), the following average values are found for the