Let me know if this is correct

So if you have lateral vibration...you have forward vibration = positive values...and you have backwards vibration = negative values

so say you have a virbation at +40 and a vibration at -20

The regular average would be 10

But rms average makes the negative number positive and takes that average so it would be rms average of 30?

(40 squared) + (-20 squared) = 2000

(2000 square root) = approx 45

45/2 = approx 22.5?

Is this correct?