condition mean min max ZT0-3 35.2266 25.89555 47.684749999999994 ZT4-7 24.3174 24.3174 24.3174 ZT8-11 35.1154 35.1154 35.1154 ZT12-15 90.804825 75.10115 106.5085 ZT16-19 73.68115 73.68115 73.68115 ZT20-23 60.5099 60.5099 60.5099