condition mean min max ZT0-3 0.6869113774544566 0.31667913000000003 1.1798899999999999 ZT4-7 0.50718526 0.50718526 0.50718526 ZT8-11 0.06065280000000001 0.06065280000000001 0.06065280000000001 ZT12-15 1.32009925 0.3841235 2.256075 ZT16-19 1.65606 1.65606 1.65606 ZT20-23 1.5497100000000001 1.5497100000000001 1.5497100000000001