condition mean min max ZT0-3 29.95225 21.14715 37.8514 ZT4-7 14.540099999999999 14.540099999999999 14.540099999999999 ZT8-11 11.223220000000001 11.223220000000001 11.223220000000001 ZT12-15 27.674875 22.283299999999997 33.06645 ZT16-19 29.02945 29.02945 29.02945 ZT20-23 38.143550000000005 38.143550000000005 38.143550000000005