condition mean min max ZT0-3 107.47646607 83.82128363999999 131.1316485 ZT4-7 50.1252442 47.14418345 53.10630495 ZT8-11 44.19290875 44.026838475000005 44.358979025 ZT12-15 30.016948219999996 28.036552909999997 31.99734353 ZT16-19 55.13512285 45.70810592 64.56213978 ZT20-23 76.0146278675 72.135161495 79.89409424