condition mean min max ZT0-3 73.96175 73.96175 73.96175 ZT4-7 33.727149999999995 33.727149999999995 33.727149999999995 ZT8-11 47.5131 47.5131 47.5131 ZT12-15 31.79125 31.79125 31.79125 ZT16-19 81.2358 81.2358 81.2358 ZT20-23 70.25615 70.25615 70.25615