docs: function transform( data ) {
  		var N = data.N,
  			g;
  
  		// Population skewness:
  		g = Math.sqrt( N )*data.M3 / Math.pow( data.M2, 3/2 );
  
  		// Sample skewness correction:
  		return Math.sqrt( N*N-1)*g / (N-2);
  	}