Descriptive statistics
Statistical tests
Design of Experiment
Gage RR
Problem resolution
Reliability
Control plan
Benutzerhandbuch Menü

Benutzerhandbuch

Abnormal value test

When analyzing a data set it can happen that we are confronted with values that do not seem to be a part of the normal data distribution. We call these abnormal value points and, as usual, you should not trust your intuition in detecting if a value is abnormal or not. There are tests that will show this.
From a statistical point of view, an abnormal value is a value that does not belong to the normal data distribution. It can come from:
  • A measurement error or copying error (forgetting a decimal)
  • A special reason such as a part that was not washed prior to being measured.
The entirety of statistical calculations using normal distribution properties (statistical tests, capability calculations, off-tolerance % calculations) is very sensitive to the presence of abnormal values. It is therefore important to understand their origin and to eliminate them before using these calculations. We may be able to use the non-parametric statistical tests, which are much less sensitive to abnormal values.
Deux tests sont principalement utilisés :
  • Dixon test: very applicable when the amount of data is low (<30)
  • Grubb test: can be used in all cases.

Eine Komplettlösung für Industrie 4.0

8 statistische Module

trial

Versuch

0

30 Tage

Testen Sie es kostenlos

APC

SPC

Kontrolle

Analyse

check

30 Tage

check

Alle Funktionen von Ellistat

check

1 Benutzer

Technische Unterstützung und Wartung inbegriffen

student

Lernende / Lehrende

0

1 Jahr

Zur Kasse

Analyse

check

1 Jahr

check

Alle Funktionen von Ellistat

check

1 Benutzer

check

Lizenz für Studenten, die über einen gültigen Studentenausweis verfügen

Technische Unterstützung und Wartung inbegriffen

standard

Standard

49

pro Benutzer pro Monat

Zur Kasse

Analyse

check

Lizenz wird alle zwei Monate erneuert

check

Alle Funktionen von Ellistat

check

Unbegrenzter Benutzer

check

Technische Unterstützung und Wartung inbegriffen