condition mean min max ZT0-3 0.36655780000000004 0.34735160000000004 0.385764 ZT4-7 0.0 0.0 0.0 ZT8-11 0.028946200000000002 0.028946200000000002 0.028946200000000002 ZT12-15 0.05530799583333333 0.020434125 0.09018186666666667 ZT16-19 0.38998849999999996 0.374498 0.405479 ZT20-23 0 0 0