docs: protected double computeMseR() {
  		double p_c;
  		double mse_r = 0;
  
  		for (int i = 0; i < this.classDistributions.length; i++) {
  			p_c = (double) this.classDistributions[i] / (double) this.chunkSizeOption.getValue();
  			mse_r += p_c * ((1 - p_c) * (1 - p_c));
  		}
  
  		return mse_r;
  	}