Memsic Accelerometer help

jayee165

I recently purchased the memsic 2125 accelerometer for a project. I am not quite understanding the correct use of it. Attached to a breadboard is the accelerometer and 9 volt battery. I am aware that the acceleromater only requires 3 to 5 volts, but I also used 4.5 volts and recieved the same outcome. I wired the accelerometer as instructed by it data sheet. The X and Y reads to be around 3.8 Volts flat on the ground. Aren't they suppose to read 0 Volts until I start to tilt it? I seen some projects use a resistor coming out of the X and Y outputs. Will I need to use a resistor and what size? Lastly, a microcontroller is mainly used when u want to read the data coming from the accelerometer on a computer screen? The data sheet for the memsic 2125 accelerometer is http://www.parallax.com/Portals/0/Downloads/docs/prod/sens/28017-Memsic2Axis-v2.0.pdf