condition mean min max ZT0-3 712.55 712.55 712.55 ZT4-7 254.6 254.6 254.6 ZT8-11 200.45 200.45 200.45 ZT12-15 172.05 172.05 172.05 ZT16-19 859.1999999999999 859.1999999999999 859.1999999999999 ZT20-23 1534.6499999999999 1534.6499999999999 1534.6499999999999