condition mean min max ZT0-3 296.828944 296.828944 296.828944 ZT4-7 324.352596 324.352596 324.352596 ZT8-11 429.7673165 429.7673165 429.7673165 ZT12-15 448.92742350000003 448.92742350000003 448.92742350000003 ZT16-19 501.440903 501.440903 501.440903 ZT20-23 380.61629949999997 380.61629949999997 380.61629949999997