condition mean min max ZT0-3 117.10196666666667 99.7068 149.923 ZT4-7 96.9436 96.9436 96.9436 ZT8-11 99.3577 99.3577 99.3577 ZT12-15 247.33575 230.176 264.4955 ZT16-19 235.801 235.801 235.801 ZT20-23 228.0435 228.0435 228.0435