condition mean min max ZT0-3 0.31544 0.31544 0.31544 ZT4-7 0.486684 0.486684 0.486684 ZT8-11 0.8733119999999999 0.8733119999999999 0.8733119999999999 ZT12-15 0.529724 0.529724 0.529724 ZT16-19 0.912991 0.912991 0.912991 ZT20-23 0.5346306666666667 0.5346306666666667 0.5346306666666667