condition mean min max ZT0-3 0.31599533 0.31599533 0.31599533 ZT4-7 0.234569036 0.234569036 0.234569036 ZT8-11 0.6932 0.6932 0.6932 ZT12-15 0.0007203369999999999 0.0007203369999999999 0.0007203369999999999 ZT16-19 1.1286010016366668 1.1286010016366668 1.1286010016366668 ZT20-23 0.36473669129999997 0.36473669129999997 0.36473669129999997