code: def reg_mean_size(prediction, y, significance):
      """Calculates the average prediction interval size of a conformal
      regression model.
      """
      return np.mean(_reg_interval_size(prediction, y, significance))
  
file_path: lightwood/lightwood/analysis/nc/metrics.py
imports: import numpy
label_desc: Use image node_id 14 for calling a global function with example usage: reg_mean_size(prediction, y, significance) and returns: np