condition mean min max ZT0-3 38.562200000000004 38.562200000000004 38.562200000000004 ZT4-7 26.52835 26.52835 26.52835 ZT8-11 23.268050000000002 23.268050000000002 23.268050000000002 ZT12-15 34.5739 34.5739 34.5739 ZT16-19 36.62705 36.62705 36.62705 ZT20-23 41.5734 41.5734 41.5734