condition mean min max ZT0-3 633.75 633.75 633.75 ZT4-7 990.2 990.2 990.2 ZT8-11 893.25 893.25 893.25 ZT12-15 696.8 696.8 696.8 ZT16-19 640.25 640.25 640.25 ZT20-23 689.2 689.2 689.2