condition mean min max ZT0-3 446.45000000000005 446.45000000000005 446.45000000000005 ZT4-7 556.2 556.2 556.2 ZT8-11 486.1 486.1 486.1 ZT12-15 443.75 443.75 443.75 ZT16-19 395.75 395.75 395.75 ZT20-23 398.3 398.3 398.3