condition mean min max ZT0-3 176.97110455 144.816373 209.12583610000001 ZT4-7 79.80365718 79.155841655 80.451472705 ZT8-11 83.8554810875 76.262097875 91.4488643 ZT12-15 75.9329945575 74.99599171 76.869997405 ZT16-19 132.357431475 124.25135475 140.46350819999998 ZT20-23 169.142674275 155.21023789999998 183.07511065