condition mean min max ZT0-3 67.83629483 41.68143812 93.99115154 ZT4-7 128.052310775 120.7221755 135.38244605 ZT8-11 84.67053179 74.51721124 94.82385234 ZT12-15 31.120532695 25.046603310000002 37.19446208 ZT16-19 38.508452972499995 37.709244055 39.30766189 ZT20-23 36.7897742975 34.417908165 39.161640430000006