| Zugriffsnummer | 12255 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Remarks on the En-Criterion used in measurement comparisons |
| Autor(in); Institution |
Wöger, Wolfgang; Q.101, Auswertung von Messungen, PTB-Braunschweig
|
| Quelle/Jahr | PTB-Mitteilungen: 109 (1999), 1, 24 - 27 |
| ISSN | 0030-834X |
| Zusammenfassung | To set up a criterion for deciding on the compatibility of two different measurements of the same measurand not only the results of measurement but also the associated uncertainties must be taken into account. In this note the socalled -criterion is considered that without detailed justification was introduced in the field of laboratory accreditation. It is discussed here within the framework of the Guide to the expression of uncertainty in measurement. A decision on compatibility using this criterion will be all the more reliable the smaller the uncertainties of the two measurements involved. The statement of the uncertainties must be carefully checked for correctness. In case of systematic effects common to both measurements but treated in the same inadequate way the stated compatibility not necessarily means that the results of measurement are reasonable estimates of the measurand. To easily apply the criterion standard uncertainties or expanded uncertainties with the same coverage factor k=2 are needed. The form of the criterion in case of two correlated measurements to be compared is given. |
| Rechteinformation | 1999, Vieweg |