condition mean min max ZT0-3 90.439066 90.439066 90.439066 ZT4-7 128.5622005 128.5622005 128.5622005 ZT8-11 97.39381449999999 97.39381449999999 97.39381449999999 ZT12-15 150.6478765 150.6478765 150.6478765 ZT16-19 89.158423 89.158423 89.158423 ZT20-23 174.73008099999998 174.73008099999998 174.73008099999998