condition mean min max ZT0-3 0.67433475 0.652786 0.6958835 ZT4-7 0.9155115 0.9155115 0.9155115 ZT8-11 1.356206 1.356206 1.356206 ZT12-15 0 0 0 ZT16-19 1.444175 1.444175 1.444175 ZT20-23 1.0061315 1.0061315 1.0061315