condition mean min max ZT0-3 0.69768125 0.434237 0.9611255 ZT4-7 0.6454945 0.6454945 0.6454945 ZT8-11 2.28548 2.28548 2.28548 ZT12-15 0 0 0 ZT16-19 2.4540949999999997 2.4540949999999997 2.4540949999999997 ZT20-23 1.39471 1.39471 1.39471