condition mean min max ZT0-3 1.50108 1.049945 2.24926 ZT4-7 1.132295 1.132295 1.132295 ZT8-11 0.9405935000000001 0.9405935000000001 0.9405935000000001 ZT12-15 0.762952 0.7089215 0.8169825 ZT16-19 0.861613 0.861613 0.861613 ZT20-23 1.1160665 1.1160665 1.1160665