Descriptive statistics
Statistical tests
Design of Experiment
Gage RR
Problem resolution
Reliability
Control plan
Menu della guida per l'utente

# The interaction concept

The interaction A*B is the fact that the degree of A has an influence on the effect of B and vice versa.
Example :
In the preceding example we observe in the figure on the left:
Whatever the level of the factor B, the effect of A on Y is the same and A has an effect of 1 on the result. There is thus no interaction between A and B.
We observe on the figure on the right: When the level of factor B is at its minimum, the effect of A on Y is 2. When the level of factor B is at its maximum, the effect of A on Y is 1. The effect of A varies according to the level of B and, therefore, there is an interaction between A and B.
When an interaction occurs the interaction effect is modelled by a multiplier in the Y prediction equation, A*B in this example. The prediction equation would be in this form:
The term α3 corresponds to the interaction A*B

## Una soluzione completa per l'Industria 4.0

8 moduli statistici

Test

0

30 giorni

Testalo gratuitamente

APC

SPC

Controllo

Analisi

30 giorni

Tutte le funzioni di Ellistat

1 utente

Supporto tecnico e ed aggiornamenti inclusi

Studenti

0

1 anno

Checkout

Analisi

1 anno

Tutte le funzioni di Ellistat

1 utente

Licenza dedicata agli studenti che dispongono di una tessera studente in corso di validità

Supporto tecnico e ed aggiornamenti inclusi

Standard

49

per utente al mese

Checkout

Analisi

Licenza rinnovata ogni mese

Tutte le funzioni di Ellistat

Utenti illimitati

Supporto tecnico e ed aggiornamenti inclusi