condition mean min max ZT0-3 567.25 567.25 567.25 ZT4-7 464.0 464.0 464.0 ZT8-11 397.45000000000005 397.45000000000005 397.45000000000005 ZT12-15 279.05 279.05 279.05 ZT16-19 353.45 353.45 353.45 ZT20-23 506.25 506.25 506.25