condition mean min max ZT0-3 9.79761 7.54587 12.04935 ZT4-7 0.3828965 0.3828965 0.3828965 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 8.21848 8.21848 8.21848 ZT20-23 4.601055000000001 4.601055000000001 4.601055000000001