condition mean min max ZT0-3 0.029331500000000003 0.029331500000000003 0.029331500000000003 ZT4-7 0.01516795 0.01516795 0.01516795 ZT8-11 0.0143885 0.0143885 0.0143885 ZT12-15 0.0 0.0 0.0 ZT16-19 0.017296033333333332 0.017296033333333332 0.017296033333333332 ZT20-23 0.030251999999999998 0.030251999999999998 0.030251999999999998