condition mean min max ZT0-3 0.90953 0.90953 0.90953 ZT4-7 0.0 0.0 0.0 ZT8-11 0.287832 0.287832 0.287832 ZT12-15 0.703065 0.703065 0.703065 ZT16-19 3.71374 3.71374 3.71374 ZT20-23 3.37118 3.37118 3.37118