condition mean min max ZT0-3 518.4000000000001 518.4000000000001 518.4000000000001 ZT4-7 290.9 290.9 290.9 ZT8-11 346.55 346.55 346.55 ZT12-15 386.0 386.0 386.0 ZT16-19 668.05 668.05 668.05 ZT20-23 725.35 725.35 725.35