condition mean min max ZT0-3 633.0 633.0 633.0 ZT4-7 491.6 491.6 491.6 ZT8-11 548.7 548.7 548.7 ZT12-15 627.8499999999999 627.8499999999999 627.8499999999999 ZT16-19 595.1 595.1 595.1 ZT20-23 570.45 570.45 570.45