condition mean min max ZT0-3 16.183775 14.262 18.10555 ZT4-7 14.230250000000002 14.230250000000002 14.230250000000002 ZT8-11 9.088065 9.088065 9.088065 ZT12-15 0 0 0 ZT16-19 15.10725 15.10725 15.10725 ZT20-23 15.3771 15.3771 15.3771