I am conducting a cross-sectional study on UK firms and aim to find (if any) a relationship between performance measures e.g ROA and board diversity while controlling for firm and board characteristics by industry. I have created dummy variables for each industry category. I want to know how I can regress my performance measures against the diversity of each industry category. Would this require creating new variables for the average of each diversity measure for each industry?

I am also unsure of what to infer from the coefficients in the following regression
Code:
reg roa div fsize bsize age i.industry, robust
I am unsure as to what exactly the coefficients represent in the attached photo below
Array