condition mean min max ZT0-3 0.9983547800000001 0.555807686 1.4409018740000001 ZT4-7 1.53376542875 1.4413908094999999 1.6261400480000001 ZT8-11 1.71258499525 1.386595218 2.0385747725 ZT12-15 2.11473698075 1.9056003739999998 2.3238735875 ZT16-19 2.0344338665 1.6907417955 2.3781259375 ZT20-23 3.43280505325 3.3553583160000002 3.5102517905