condition mean min max ZT0-3 193.61716666666666 138.562 223.977 ZT4-7 71.9821 71.9821 71.9821 ZT8-11 25.1656 25.1656 25.1656 ZT12-15 49.1756 39.76505 58.58615 ZT16-19 45.6818 45.6818 45.6818 ZT20-23 112.1335 112.1335 112.1335