condition mean min max ZT0-3 423.65 423.65 423.65 ZT4-7 539.3 539.3 539.3 ZT8-11 467.20000000000005 467.20000000000005 467.20000000000005 ZT12-15 367.15 367.15 367.15 ZT16-19 414.85 414.85 414.85 ZT20-23 415.70000000000005 415.70000000000005 415.70000000000005