Ballscrewbob:
You didn't say which IDE you are using but if its 1.6.12 then there is a very simple test you can do to see how much noise is in and around your Arduino.Simply plug in a UNO or MEGA especially clones.
Load up the AnalogReadSerial sketch from examples and make sure nothing is plugged into the board.
Go to Tools on the IDE and select Serial Plotter.
keep your body parts at least a foot away from it and let the readings settle for a couple of moments.then slowly move your hand towards and close to the Arduino and watch the serial plotter.
Oh and those numbers on the left side...that's mostly noise of the electrical type.
there are lots of things you can do to minimise it but I leave that to the real electrical guys here as I understand it but they have so much more knowledge than I do on the matter or give google a whirl for electrical noise but it may frighten you as it is a law and topic all by itself. so safer here unless you are awesome with that sort of thing.
Oh and the difference between a real and a clone in this regard...
OK seems it doesn't like google drive URLs so just right click where the pic is supposed to be and open in a new tab
I'm using IDE 1.7.10