text: from numpy import mean, sqrt, sum
  # TODO: Make these computations more efficient
  
  def rms(a):
      return sqrt(mean(a**2))
  
  def skw(a):
      return mean(a**3) / rms(a)**3
  
  def mean2(a):
      n = len(a)
      return 2 * sum(a[:n//2]) / n
  
  def mean3(a):
      n = len(a)
      return (3 * sum(a[:n//3]) + a[n//3]) / n
  
  def mean10(a):
      n = len(a)
      return (10 * sum(a[:n//10]) + 4 * a[n//10]) / n
  
  def mean100(a):
      n = len(a)
      return (100 * sum(a[:n//100]) + 54 * a[n//100]) / n
  
  