condition mean min max ZT0-3 242.05 242.05 242.05 ZT4-7 637.9 637.9 637.9 ZT8-11 607.75 607.75 607.75 ZT12-15 569.45 569.45 569.45 ZT16-19 301.4 301.4 301.4 ZT20-23 248.0 248.0 248.0