condition mean min max ZT0-3 0.12258179999999999 0.0898095 0.18500794999999998 ZT4-7 0.34928499999999996 0.34928499999999996 0.34928499999999996 ZT8-11 0.40553150000000004 0.40553150000000004 0.40553150000000004 ZT12-15 0.143439375 0.04993025 0.2369485 ZT16-19 0.3442805 0.3442805 0.3442805 ZT20-23 0.09664455 0.09664455 0.09664455