condition mean min max ZT0-3 71.38138085583333 68.240210175 74.52255153666667 ZT4-7 80.14614873333333 75.79931194 84.49298552666667 ZT8-11 67.31916919 63.072239419999995 71.56609896 ZT12-15 80.431580475 77.97917789 82.88398305999999 ZT16-19 74.03511027833333 72.77074133 75.29947922666666 ZT20-23 75.90060100166667 73.68454315333334 78.11665885