condition mean min max ZT0-3 149.3986612 129.7400084 169.057314 ZT4-7 120.64594429166667 108.73786531666666 132.55402326666666 ZT8-11 115.90717722833332 102.73530175666666 129.0790527 ZT12-15 95.067161005 86.39686585999999 103.73745615000001 ZT16-19 121.18899803333333 113.79305959999999 128.58493646666668 ZT20-23 126.89172654833334 92.50532313000001 161.27812996666665