condition mean min max ZT0-3 22.12605 22.12605 22.12605 ZT4-7 16.206 16.206 16.206 ZT8-11 14.52875 14.52875 14.52875 ZT12-15 19.5387 19.5387 19.5387 ZT16-19 23.5789 23.5789 23.5789 ZT20-23 22.898600000000002 22.898600000000002 22.898600000000002