condition mean min max ZT0-3 73.46955 73.46955 73.46955 ZT4-7 40.350849999999994 40.350849999999994 40.350849999999994 ZT8-11 39.19095 39.19095 39.19095 ZT12-15 66.82544999999999 66.82544999999999 66.82544999999999 ZT16-19 101.1015 101.1015 101.1015 ZT20-23 99.21690000000001 99.21690000000001 99.21690000000001