condition mean min max ZT0-3 86.403731 86.403731 86.403731 ZT4-7 87.86382950000001 87.86382950000001 87.86382950000001 ZT8-11 104.444519 104.444519 104.444519 ZT12-15 97.871358 97.871358 97.871358 ZT16-19 97.8456815 97.8456815 97.8456815 ZT20-23 81.45453499999999 81.45453499999999 81.45453499999999