condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03573995 0.03573995 0.03573995 ZT8-11 0.14081549999999998 0.14081549999999998 0.14081549999999998 ZT12-15 0 0 0 ZT16-19 0.0344492 0.0344492 0.0344492 ZT20-23 0.06938235000000001 0.06938235000000001 0.06938235000000001