condition mean min max ZT0-3 11.745505 11.745505 11.745505 ZT4-7 11.342463500000001 11.342463500000001 11.342463500000001 ZT8-11 10.718128 10.718128 10.718128 ZT12-15 11.247701 11.247701 11.247701 ZT16-19 11.224198 11.224198 11.224198 ZT20-23 10.874161 10.874161 10.874161