Answer
Interaction P-value $=0.854$. Do not reject the null hypothesis.
There is not enough evidence to conclude that there is an interaction between Location and Service center type.
Work Step by Step
$H_0:$ there is no interaction between Location and Service center type.
versus
$H_1:$ there is an interaction between Location and Service center type.
In MINITAB 18, enter the data according to the table below.
Select Stat -> ANOVA -> General Linear Model -> Fit General Linear Model
In Responses enter Prices (C3). In Factors enter 'Service center' Location (C1 C2).
Click Model. In Factors and covariates highlight both Service center and Location. Click Add (to the right of Interactions through order). Service center*Location will appear in 'Terms in the model'. Click OK.
Click Ok.
The interaction P-value $=0.854$
