condition mean min max ZT0-3 9.401507500000001 3.727065 15.07595 ZT4-7 25.566650000000003 25.566650000000003 25.566650000000003 ZT8-11 17.9115 17.9115 17.9115 ZT12-15 0 0 0 ZT16-19 26.58495 26.58495 26.58495 ZT20-23 16.906100000000002 16.906100000000002 16.906100000000002