condition mean min max ZT0-3 992.8686281500001 238.37905319999996 1747.3582031 ZT4-7 4214.0718135 3639.8078944999997 4788.3357325 ZT8-11 3680.332666 3205.533219 4155.132113 ZT12-15 921.2911479249999 389.55669539999997 1453.02560045 ZT16-19 215.407101825 199.07910145 231.73510220000003 ZT20-23 133.2422976725 76.278521645 190.2060737