condition mean min max ZT0-3 32.45735647 26.36146393 38.55324901 ZT4-7 50.311583555 44.214786895 56.408380215 ZT8-11 40.11979486 39.02291639 41.216673330000006 ZT12-15 36.9817820125 35.00011995 38.963444075 ZT16-19 42.102035900000004 34.15536935 50.04870245 ZT20-23 72.3052319075 65.817522845 78.79294097