condition mean min max ZT0-3 3.61545 3.61545 3.61545 ZT4-7 3.52574 3.52574 3.52574 ZT8-11 2.2045399999999997 2.2045399999999997 2.2045399999999997 ZT12-15 2.3442499999999997 2.3442499999999997 2.3442499999999997 ZT16-19 4.109345 4.109345 4.109345 ZT20-23 3.1212549999999997 3.1212549999999997 3.1212549999999997