condition mean min max ZT0-3 428.3655 364.5045 552.1759999999999 ZT4-7 462.7325 462.7325 462.7325 ZT8-11 438.6815 438.6815 438.6815 ZT12-15 406.2675 402.4425 410.0925 ZT16-19 354.18399999999997 354.18399999999997 354.18399999999997 ZT20-23 337.2475 337.2475 337.2475