condition mean min max ZT0-3 11.842273 11.842273 11.842273 ZT4-7 14.1435955 14.1435955 14.1435955 ZT8-11 22.996701 22.996701 22.996701 ZT12-15 11.858046 11.858046 11.858046 ZT16-19 17.227716 17.227716 17.227716 ZT20-23 12.7575255 12.7575255 12.7575255