condition mean min max ZT0-3 53.31345 53.31345 53.31345 ZT4-7 31.277649999999998 31.277649999999998 31.277649999999998 ZT8-11 21.1888 21.1888 21.1888 ZT12-15 24.81655 24.81655 24.81655 ZT16-19 71.77234999999999 71.77234999999999 71.77234999999999 ZT20-23 62.80975 62.80975 62.80975