condition mean min max ZT0-3 1.34233 1.1272 1.5574599999999998 ZT4-7 1.727355 1.727355 1.727355 ZT8-11 1.7277550000000002 1.7277550000000002 1.7277550000000002 ZT12-15 0 0 0 ZT16-19 1.9059 1.9059 1.9059 ZT20-23 1.913075 1.913075 1.913075