condition mean min max ZT0-3 528.8 528.8 528.8 ZT4-7 621.5 621.5 621.5 ZT8-11 457.0 457.0 457.0 ZT12-15 441.90000000000003 441.90000000000003 441.90000000000003 ZT16-19 461.5 461.5 461.5 ZT20-23 467.29999999999995 467.29999999999995 467.29999999999995