condition mean min max ZT0-3 56.6593 56.6593 56.6593 ZT4-7 44.30025 44.30025 44.30025 ZT8-11 45.8471 45.8471 45.8471 ZT12-15 49.82618333333333 49.82618333333333 49.82618333333333 ZT16-19 52.6943 52.6943 52.6943 ZT20-23 67.89705000000001 67.89705000000001 67.89705000000001