condition mean min max ZT0-3 949.6999999999999 949.6999999999999 949.6999999999999 ZT4-7 1293.9 1293.9 1293.9 ZT8-11 1184.9499999999998 1184.9499999999998 1184.9499999999998 ZT12-15 957.5 957.5 957.5 ZT16-19 698.05 698.05 698.05 ZT20-23 667.9000000000001 667.9000000000001 667.9000000000001