condition mean min max ZT0-3 54.997 54.997 54.997 ZT4-7 49.662400000000005 49.662400000000005 49.662400000000005 ZT8-11 44.76235 44.76235 44.76235 ZT12-15 49.7592 49.7592 49.7592 ZT16-19 50.7495 50.7495 50.7495 ZT20-23 57.1649 57.1649 57.1649