condition mean min max ZT0-3 12.1376466195 11.446090459 12.82920278 ZT4-7 21.5455632175 16.987141105 26.10398533 ZT8-11 23.659569617499997 20.56119686 26.757942375 ZT12-15 64.53542575499999 46.098793745 82.97205776499999 ZT16-19 92.1887797075 85.02391272 99.35364669500001 ZT20-23 113.1647469 104.140634 122.18885979999999