condition mean min max ZT0-3 0.6326398095 0.153054948 1.1122246709999999 ZT4-7 3.2276059695 2.8376003250000004 3.6176116139999994 ZT8-11 5.57682609 4.5672758545 6.5863763255 ZT12-15 8.614814219749999 7.9156793295 9.31394911 ZT16-19 7.4445202442500005 6.758319176 8.1307213125 ZT20-23 10.69990136125 9.438893692499999 11.96090903