condition mean min max ZT0-3 0.23800575000000002 0.1844685 0.291543 ZT4-7 0.293435 0.293435 0.293435 ZT8-11 0.29727950000000003 0.29727950000000003 0.29727950000000003 ZT12-15 0 0 0 ZT16-19 0.471619 0.471619 0.471619 ZT20-23 0.5838209999999999 0.5838209999999999 0.5838209999999999