condition mean min max ZT0-3 0.436296 0.436296 0.436296 ZT4-7 0.14152235000000002 0.14152235000000002 0.14152235000000002 ZT8-11 0.32088300000000003 0.32088300000000003 0.32088300000000003 ZT12-15 0.2638205 0.2638205 0.2638205 ZT16-19 0.492526 0.492526 0.492526 ZT20-23 0.315106 0.315106 0.315106