condition mean min max ZT0-3 0.06156175 0.0 0.1231235 ZT4-7 0.44115550000000003 0.44115550000000003 0.44115550000000003 ZT8-11 0.311729 0.311729 0.311729 ZT12-15 0 0 0 ZT16-19 0.247808 0.247808 0.247808 ZT20-23 0.1251745 0.1251745 0.1251745