condition mean min max ZT0-3 27.73335 27.73335 27.73335 ZT4-7 23.7891 23.7891 23.7891 ZT8-11 20.442300000000003 20.442300000000003 20.442300000000003 ZT12-15 21.3185 21.3185 21.3185 ZT16-19 23.25145 23.25145 23.25145 ZT20-23 30.240499999999997 30.240499999999997 30.240499999999997