condition mean min max ZT0-3 684.803041 684.803041 684.803041 ZT4-7 588.7455815000001 588.7455815000001 588.7455815000001 ZT8-11 382.5293905 382.5293905 382.5293905 ZT12-15 464.25885700000003 464.25885700000003 464.25885700000003 ZT16-19 515.901078 515.901078 515.901078 ZT20-23 573.1642939999999 573.1642939999999 573.1642939999999