condition mean min max ZT0-3 285.05 285.05 285.05 ZT4-7 727.0 727.0 727.0 ZT8-11 696.3 696.3 696.3 ZT12-15 607.4000000000001 607.4000000000001 607.4000000000001 ZT16-19 356.5 356.5 356.5 ZT20-23 317.75 317.75 317.75