condition mean min max ZT0-3 7.3665985890000005 2.8228459310000003 11.910351247000001 ZT4-7 26.567886852500003 25.724717730000002 27.411055975 ZT8-11 34.044734572500005 29.239312995 38.850156150000004 ZT12-15 61.43119508 58.308108020000006 64.55428214 ZT16-19 62.2174150775 62.154274865000005 62.280555289999995 ZT20-23 61.6174611225 58.06256658 65.172355665