condition mean min max ZT0-3 3.09154 3.09154 3.09154 ZT4-7 1.4856705 1.4856705 1.4856705 ZT8-11 1.17702 1.17702 1.17702 ZT12-15 4.134315 4.134315 4.134315 ZT16-19 4.983515000000001 4.983515000000001 4.983515000000001 ZT20-23 3.230055 3.230055 3.230055