Benutzerhandbuch Menü

Benutzerhandbuch

Example 3: Comparison of 2 frequencies

You received two batches from two different suppliers. The red parts represent the defective parts. The defect rate of supplier A is 2/24 and defect rate of supplier B is 5/30. With the data at your disposal, can you say that supplier a is significantly better than supplier B?
Exemple 3

Which test do you choose?

Enter the data in Ellistat. Then select the Inferential statistics menu (on the left). In the adapted test menu (table on top), select the two columns containing your Y data (here supplier a and supplier B).
Exemple-1-1
The inappropriate tests will become greyed out and the only choice left will be the 2P test.
Explanation:
Choix test
Left hand table- Depending on the comparison to be carried out: We want to compare the defect frequency between the two samples, therefore we use test 2P.
Right hand table - Depending on the types of variables:Y is the result of the OK/KO measurement (qualitative), dependant (X) on the kind of supplier, A or B (qualitative), therefore the comparison requires a 2P test

Result :

Enter the data from the 2 samples in the corresponding boxes.
Résultat
The difference between the two samples is not significant. This means that supplier A can not be considered to produce significantly fewer defects than supplier B. Contrary to our intuition, supplier A is not necessarily better than supplier B.

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

Student

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