condition mean min max ZT0-3 11.59805 11.59805 11.59805 ZT4-7 10.6588 10.6588 10.6588 ZT8-11 14.8107 14.8107 14.8107 ZT12-15 17.5981 17.5981 17.5981 ZT16-19 18.3128 18.3128 18.3128 ZT20-23 13.1097 13.1097 13.1097