condition mean min max ZT0-3 29.81795 27.52715 31.0567 ZT4-7 32.83415 32.83415 32.83415 ZT8-11 23.329349999999998 23.329349999999998 23.329349999999998 ZT12-15 30.918375 27.3575 34.47925 ZT16-19 27.92425 27.92425 27.92425 ZT20-23 30.2426 30.2426 30.2426