condition mean min max ZT0-3 0.04102775 0.04102775 0.04102775 ZT4-7 0.0 0.0 0.0 ZT8-11 0.00771055 0.00771055 0.00771055 ZT12-15 0.09397575 0.09397575 0.09397575 ZT16-19 0.35702449999999997 0.35702449999999997 0.35702449999999997 ZT20-23 0.1026832 0.1026832 0.1026832