condition mean min max ZT0-3 572.091106 572.091106 572.091106 ZT4-7 486.14380500000004 486.14380500000004 486.14380500000004 ZT8-11 507.4210745 507.4210745 507.4210745 ZT12-15 541.1481154999999 541.1481154999999 541.1481154999999 ZT16-19 599.3584965 599.3584965 599.3584965 ZT20-23 728.5599515 728.5599515 728.5599515