new_contents: """Functions related to statistics and uncertainties"""
  from __future__ import print_function, division
  
  
  def sample_var_var(std, n):
      """
      The variance of the sample variance of a distribution.
  
      Assumes the samples are normally distributed.
  
      From: //math.stackexchange.com/q/72975
  
      `std`: Distribution's standard deviation
      `n`: Number of samples
      """
      return 2.0 * std ** 4 / (n - 1.0)
  
subject: Add stats module with function for variance of a sample variance