docs: function kde_estimator_silverman( vector ) {
  	var stdev, N = vector.length, A;
  
  	// [0] Calculate the sample standard deviation:
  	stdev = Vector.stdev( vector );
  
  	// [1] Calculate the estimator:
  	A = Math.pow( ( 4/(3*N) ), 0.2 );
  	return A * stdev;
  }