condition mean min max ZT0-3 49.5241 46.43325 54.51795 ZT4-7 35.055350000000004 35.055350000000004 35.055350000000004 ZT8-11 17.99255 17.99255 17.99255 ZT12-15 12.5990225 8.729045 16.469 ZT16-19 12.21495 12.21495 12.21495 ZT20-23 30.4943 30.4943 30.4943