I already search the net with regards to the significance of the baseline variable. One of the sources that I've read is you will not know whether a baseline variable is significant to the regression model.However, people would ask whether the response in the baseline variable is significant or not. Let say I have a data (see below), where:
1=Elementary Graduate, 2=High School Graduate, and 3=College Graduate.
How will I know whether mean response for the categorical variable not represented by dummy in the regression model (1=Elementary Graduate) is significant? How will I quantify it since it does not have coefficient?
I understand that we can change the base category but it always leave the unrepresented category without decision whether its mean response is significant and what its estimated coefficient. How will I interpret the results in the analysis including the baseline variable?