condition mean min max ZT0-3 0.18439945 0.13922489999999998 0.229574 ZT4-7 0.416148 0.416148 0.416148 ZT8-11 0.412979 0.412979 0.412979 ZT12-15 0 0 0 ZT16-19 0.3654935 0.3654935 0.3654935 ZT20-23 0.18387165 0.18387165 0.18387165