condition mean min max ZT0-3 0.34613875000000005 0.158611 0.5336665 ZT4-7 0.592129 0.592129 0.592129 ZT8-11 0.2699015 0.2699015 0.2699015 ZT12-15 0 0 0 ZT16-19 0.315081 0.315081 0.315081 ZT20-23 0.42106150000000003 0.42106150000000003 0.42106150000000003