rules:
- expr: mean(weight)
  name: average
  label: 'mean weight'
  description: ''
  created: 2017-07-19 09:32:25
  origin: indicate.txt
- expr: sd(height)
  name: I2
  label: ''
  description: ''
  created: 2017-07-19 09:32:25
  origin: indicate.txt

