condition mean min max ZT0-3 4.085077500000001 3.68604 4.484115 ZT4-7 4.00959 4.00959 4.00959 ZT8-11 5.302695 5.302695 5.302695 ZT12-15 0 0 0 ZT16-19 7.0487850000000005 7.0487850000000005 7.0487850000000005 ZT20-23 5.599785000000001 5.599785000000001 5.599785000000001