public static synchronized double makeNoise(double mean,double standardDiviation){
  return random.nextGaussian() * Math.sqrt(standardDiviation) + mean;
}

public static synchronized double makeNoise ( double mean , double standardDiviation ) { return random . nextGaussian ( ) * Math . sqrt ( standardDiviation ) + mean ; }
create a gaussian noise around supplied mean value based on supplied standarddiviation
