condition mean min max ZT0-3 1.19733 0.894513 1.500147 ZT4-7 1.660385 1.660385 1.660385 ZT8-11 2.9670500000000004 2.9670500000000004 2.9670500000000004 ZT12-15 0 0 0 ZT16-19 3.0261199999999997 3.0261199999999997 3.0261199999999997 ZT20-23 1.9256600000000001 1.9256600000000001 1.9256600000000001