condition mean min max ZT0-3 0.07822175 0.056969500000000006 0.099474 ZT4-7 0.0575267 0.0575267 0.0575267 ZT8-11 0.19994099999999998 0.19994099999999998 0.19994099999999998 ZT12-15 0 0 0 ZT16-19 0.02795075 0.02795075 0.02795075 ZT20-23 0.04216155 0.04216155 0.04216155