condition mean min max ZT0-3 121.295791 121.295791 121.295791 ZT4-7 142.207349 142.207349 142.207349 ZT8-11 140.4235055 140.4235055 140.4235055 ZT12-15 132.783113 132.783113 132.783113 ZT16-19 128.58057 128.58057 128.58057 ZT20-23 126.08712650000001 126.08712650000001 126.08712650000001