condition mean min max ZT0-3 519.4466666666667 164.253 739.1995 ZT4-7 183.696 183.696 183.696 ZT8-11 234.7145 234.7145 234.7145 ZT12-15 342.60949999999997 288.35699999999997 396.86199999999997 ZT16-19 600.8155 600.8155 600.8155 ZT20-23 814.4535 814.4535 814.4535