condition mean min max ZT0-3 474.199494 474.199494 474.199494 ZT4-7 708.3896625 708.3896625 708.3896625 ZT8-11 725.1347575 725.1347575 725.1347575 ZT12-15 769.109111 769.109111 769.109111 ZT16-19 578.542976 578.542976 578.542976 ZT20-23 458.02643950000004 458.02643950000004 458.02643950000004