condition mean min max ZT0-3 90.344752 90.344752 90.344752 ZT4-7 82.8621875 82.8621875 82.8621875 ZT8-11 63.8415185 63.8415185 63.8415185 ZT12-15 87.61071100000001 87.61071100000001 87.61071100000001 ZT16-19 62.300374 62.300374 62.300374 ZT20-23 77.476659 77.476659 77.476659