condition mean min max ZT0-3 105.99028333333334 28.45835 164.0885 ZT4-7 28.8746 28.8746 28.8746 ZT8-11 34.53915 34.53915 34.53915 ZT12-15 87.494575 52.29315 122.696 ZT16-19 146.776 146.776 146.776 ZT20-23 173.202 173.202 173.202