What is the relation in boost to compresion? How many pounds of boost causes the compresion in the motor to rise?

Heres an example: If the compresion in the motor without a turbo is 9.8-1 and then you add 10 lbs of boost what does the compresion sit at with that much boost. Just curious and I dont know a whole lot about this so if I made myself look like an idiot dont flame me to bad.