condition mean min max ZT0-3 1.9732107337500002 1.591771456 2.3546500115000004 ZT4-7 2.5227177495 1.803523605 3.2419118940000002 ZT8-11 30.0417488175 6.6465894695 53.4369081655 ZT12-15 66.4888642025 64.4046103 68.57311810499999 ZT16-19 32.0986536085 23.051901962 41.145405255 ZT20-23 7.27527701925 4.6176010175 9.932953021