condition mean min max ZT0-3 40.204899999999995 40.204899999999995 40.204899999999995 ZT4-7 31.804100000000002 31.804100000000002 31.804100000000002 ZT8-11 39.01025 39.01025 39.01025 ZT12-15 43.059 43.059 43.059 ZT16-19 51.42235 51.42235 51.42235 ZT20-23 46.662400000000005 46.662400000000005 46.662400000000005