condition mean min max ZT0-3 3.29035 3.08571 3.49499 ZT4-7 4.24083 4.24083 4.24083 ZT8-11 1.1177549999999998 1.1177549999999998 1.1177549999999998 ZT12-15 0 0 0 ZT16-19 1.006971 1.006971 1.006971 ZT20-23 4.29886 4.29886 4.29886