condition mean min max ZT0-3 0.23739350000000004 0.191771 0.28301600000000005 ZT4-7 0.04876315 0.04876315 0.04876315 ZT8-11 0.47894899999999996 0.47894899999999996 0.47894899999999996 ZT12-15 0 0 0 ZT16-19 0.7075325 0.7075325 0.7075325 ZT20-23 0.42658550000000006 0.42658550000000006 0.42658550000000006