condition mean min max ZT0-3 50.162866666666666 20.77865 102.30969999999999 ZT4-7 105.425 105.425 105.425 ZT8-11 58.73985 58.73985 58.73985 ZT12-15 44.459475 35.18745 53.7315 ZT16-19 20.1413 20.1413 20.1413 ZT20-23 12.30635 12.30635 12.30635